Calculator 1 converts any ratio to a percent. That is, it answers the question “what percent is ‘X’ of ‘Y’, i.e., ‘X:Y’ or ‘X/Y'”?
To use it, first understand the ratio. For example, if you earn $1,000 a week and you have $183 taken out of your pay, and you want to know what percentage of your pay gets deducted from the total then the ratio you want to convert is 183:1000. Enter 183 as “This number” and the 1,000 as the “is what percent of this number.” The result is 18.3%. Or you have 18.3% deducted from your pay.
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Calculator 1 can also be used as a fraction to percent calculator. How? If you’ve been following along, you probably already know. But for those who may have skipped ahead, the answer is simple. Take any fractions, for example, “27/82”, and enter the numerator (27) into “This number.” Then take the denominator (82) and enter it into “is what percent of this number.” The percentage is 32.9268%.
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Notice also that percentage calculator 1 works as a percent to decimal calculator as well.
Are you getting the idea?
Do you see the relationship between percents, ratios, and fractions?
If not, this would be a good place to stop and review what I’ve written so far. The balance of the material builds on what we’ve learned. Go ahead, and I’ll wait.
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What happens when we know the percent, but we don’t know one of the two numbers in the ratio?
- Imagine we want to know “X” is 20% of what number “Y” if “X” equals 2,250. (The ratio looks like this: 2250:Y). You have to pay 20% of an upcoming doctor’s bill, and the insurance company will pay the balance. You have $2,250. What is the maximum amount the bill can be so that you’ll still have enough to cover your share? Use Percentage Calculator 2
- Or suppose we want to know what number “X” is 90% of “Y” if “Y” is 145? (The ratio looks like this: X:145). An “A” grade is 90% or above. If there are 145 questions on the test, how many do I have to get right to get an “A”? Use Percentage Calculator 3
- Finally, what if you need to know the percentage change (increase or decrease) between amount or size “X” and “Y”? An item you have been thinking of purchasing had cost $249.95 and now costs $199.95. The ratio is 249.95:199.95. What is the percent the price dropped? (We would ask what is the “discount?”) We can easily flip the calculation on its head. Suppose the price had been $199.95 and is now $249.95 (199.95:249.95), what is the percent increase? Use Percentage Calculator 4
Why do the above two calculations have different results?
Notice ratios need not have only integer (whole number) parts. Frequently, many people need to do percentage calculations involving money, as we see above.
Want to read more about percentages? Check out this Wikipedia article.
- Percentage Calculator
- This Number is “X” Percent Of What Number?
- What Number Is “X” Percent Of This Number?
- Percent Increase/Decrease Calculator
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