What is 42 Percent of 79?
42% of 79 = 33.18
Step by step
- Turn the percentage into a decimal: 42 ÷ 100 = 0.42
- Multiply: 0.42 × 79 = 33.18
How the answer is worked out
“Percent” means “per hundred”, so 42% is 42 out of every 100, or 0.42 as a decimal. Taking 42% of 79 means multiplying 79 by 0.42, which gives 33.18.
33.18 is the 42% share of 79. The remaining 58% is 45.82, and the two parts add back up to 79.
Why calculate this?
Taking a percentage of a number is how discounts, tips, tax and interest are worked out.
- Discounts: 42% off an item priced $79 saves $33.18, so you pay $45.82.
- Tips: a 42% tip on a bill of $79 is $33.18, so the total is $112.18.
- Interest: simple interest of 42% a year on $79 earns $33.18 in one year and $165.9 over five years.
- Tax: a sales tax of 42% on a price of $79 adds $33.18, so the price including tax is $112.18.
A quicker way
Use 10% and 1%: 10% of 79 is 7.9 and 1% is 0.79. 42% is 4 × 10% + 2 × 1% = 31.6 + 1.58 = 33.18.
Swap the numbers if that is easier: 42% of 79 is always the same as 79% of 42, because both are 42 × 79 ÷ 100.
Check the answer
Work backwards: 33.18 ÷ 79 × 100 = 42%. Getting 42% back shows the answer is right.
Rounding
Rounded to a whole number the result is 33, to one decimal place 33.2 and to two decimal places 33.18. Round only at the end: rounding halfway through a calculation can change the last digit.
The formula explained
result = percentage ÷ 100 × number. Dividing the percentage by 100 turns it into a decimal multiplier, so 25% becomes 0.25 and 150% becomes 1.5. Multiplying the number by that decimal gives the share.
Another worked example: 9% of 75
- Turn the percentage into a decimal: 9 ÷ 100 = 0.09
- Multiply: 0.09 × 75 = 6.75
Common percentages of 79
10% of 79 is 7.9, 20% is 15.8, a quarter (25%) is 19.75, half (50%) is 39.5 and three quarters (75%) is 59.25. Knowing these makes it easy to estimate any other percentage of 79 in your head.
Adding and taking away 42%
Increasing 79 by 42% gives 112.18 and decreasing it by 42% gives 45.82. These do not cancel out: raising 79 by 42% and then lowering the result by 42% ends at 65.0644, because the second 42% is taken of a bigger number.
Finding the original number
If 33.18 is 42% of something, divide by 0.42 to get it back: 33.18 ÷ 0.42 = 79. This is how you work out a price before tax or a full amount from a share of it.
Other ways to ask this
The same calculation is often asked in other words. All of these have the answer above:
- What is 42 percent of 79?
- 42% of 79
- 42 percent times 79
- Find 42% of 79
- How much is 42 per cent of 79?
Terms used on this page
- Percentage: the rate, the number with the % sign.
- Base: the number you take the percentage of.
- Decimal multiplier: the percentage divided by 100.
- Mark-up and discount: adding or taking away a percentage of a price.
The answer in other forms
| Result | 33.18 |
|---|---|
| Remaining | 45.82 |
| 42% as decimal | 0.42 |
| 79 + 42% | 112.18 |
Related results
| 5% of 79 | 5% of 79 = 3.95 |
| 10% of 79 | 10% of 79 = 7.9 |
| 15% of 79 | 15% of 79 = 11.85 |
| 20% of 79 | 20% of 79 = 15.8 |
| 25% of 79 | 25% of 79 = 19.75 |
| 50% of 79 | 50% of 79 = 39.5 |
| 75% of 79 | 75% of 79 = 59.25 |
The other way round: 79% of 42
Doing it in a spreadsheet
In Excel, Google Sheets or Numbers type =42%*79 into any cell. Replace the numbers with cell references (for example A1 and B1) to reuse the formula for a whole column.
Common mistakes
Forgetting to divide the percentage by 100 makes the answer 100 times too big. Note that x% of y always equals y% of x.
Practice examples
| 9% of 75 | Show answer9% of 75 = 6.75 |
| 92% of 37 | Show answer92% of 37 = 34.04 |
| 15% of 67 | Show answer15% of 67 = 10.05 |
| 10% of 81 | Show answer10% of 81 = 8.1 |
| 90% of 29 | Show answer90% of 29 = 26.1 |
| 16% of 86 | Show answer16% of 86 = 13.76 |
| 75% of 94 | Show answer75% of 94 = 70.5 |
| 32% of 78 | Show answer32% of 78 = 24.96 |
| 52% of 45 | Show answer52% of 45 = 23.4 |
| 25% of 45 | Show answer25% of 45 = 11.25 |
How this answer was calculated
The result is worked out from the numbers in this page's address when the page is opened, using exact arithmetic wherever possible and rounding only for display. Nothing is copied from a printed table. If you think an answer is wrong, please tell us through the contact page and we will check it.
Reference this page
Copy a citation or link:
<a href="https://sumwisemath.com/calc/percent-of-number/42-percent-of-79/">What is 42 Percent of 79?</a>
"What is 42 Percent of 79?". Sumwise. https://sumwisemath.com/calc/percent-of-number/42-percent-of-79/
Questions
What is 42 Percent of 79?
42% of 79 is 33.18. Formula, steps and practice examples.
What is 42% off 79?
45.82. Taking 42% off leaves 58% of 79.
What is 79 plus 42%?
112.18. Adding 42% is the same as multiplying by 1.42.
What is 42% of 79 as a fraction?
42/100 × 79 = 3318/100, which simplifies to 1659/50.
How do I find 42% of a number on a calculator?
Multiply the number by 0.42. For 79 that is 79 × 0.42 = 33.18. On many calculators you can also type 79 × 42 %.