Answer
109/151 x 100% = 72.2%
Explanation:
It is easier to understand this if written the other way around.
What percent is 109 out of 151?
Like " My mark was 20 out of 28 for the test. What percent is that?"
When you divide 109/151 the answer is already in decimal form.
109/151 = 0.722 which means the same as 72.2/100
NOte that this is already written as a percent (it is out of 100)
Let's change the format, without changing the value.
109/151 x 100% = 72.2%
× 100% is the same as x1