If you’re one of those people who still use a calculator for basic math problems, fear not! You are not alone. But have no fear, because today we’re going to unlock the mystery behind the simple question “What is 15 of 22?”
Taking it Back to Basics
Let’s start with some basics. When we say “what is 15 of 22, ” we are really asking what percentage of 22 is equal to 15. To figure that out, simply divide the smaller number by the larger number , and multiply by 100%. Let’s break it down stepbystep:

Step One: Divide the smaller number by the larger number . In this case, that means dividing 15 by 22.

Step Two: Multiply your answer from step one by 100%. This will give you your answer as a percentage.
So now let’s do some quick math:
If we divide
 Part 
—————————— = ————————
 Whole 
/ //
/ // %
We get:
/=\\
/ \\
 
\_O_/
Doing The Math
Now that we know how to calculate percentages, let’s put theory into practice! Using our formula above:
 Step One:
15 ÷ 22 = 0. 68. . .
 Step Two:
0. 68. . . x 100% = 68%
So if someone asks you “What is fifteen of twentytwo?”, tell them with confidence that it is approximately sixtyeight percent or about threefifths.
Some Numbers Tricks
There are a few tricks that can help us remember certain percentages from popular fractions. Here’s some examples:

One percent of a number is equal to one hundredth of it or. 01 times the whole.

Ten percent of a number is exactly the same as taking the entire quantity and dividing it by 10, eg
10% = 1/10
. 
Fifty percent, also known as half, means you’re cutting your final value in half so if we have been working with
22
then we can cut it down by half which is approximately11
.
Fun fact: Did you know that when given two numbers A and B, to calculate percentage error, simply calculate /A?
Q&A Time!
Q: What are some common uses for calculating percentages?
A: Calculating tips on restaurant bills; performing financial analyses; predicting sales figures; analyzing population demographics.
Q: Can percentage calculations be applied in nonmathematical contexts?
A: Absolutely! Percentages can describe all sorts of things like lifestyle changes, overcoming challenges and growing personally or professionally.
So there we have it – mystery solved! Hopefully this article has helped you understand how to calculate percentages and answer questions like “what is fifteen out of twentytwo?” just like a mathematician.