57/80 is 71.25% as a percent
Percent is derived from Latin word "per centum" which means "by a hundred". Percent can be thought of a fraction where denominator is always 100, and we add % sign to the fraction. For example, fraction 57/80 means 71.25 %.
Steps:
First divide 57 by 80: 57 ÷ 80 = 0.7125
Then multiply by 100: 0.7125 × 100 = 71.25
Answer: 57 80 = 71.25%
(Remember to put the "%" sign so people know it is "per 100")
OR you can multiply the top by 100 first then divide by the bottom number:
Multiply 57 by 100 first, then divide by 80
5700 ÷ 80 = 71.25
Answer: 57 80 = 71.25%
(Remember that "%" sign!)
Or Move the Decimal 2 Places
After dividing, instead of multiplying by 100 we can just move the decimal point 2 places to the right, then add the %
First divide 57 by 80:
57 ÷ 80 = 0.7125
Move the decimal point 2 places to the right
2 places
Remember to add the "%" sign: 71.25%
Lets say in a maths test, you score 19 marks out of 20, it means you scored 95%.
Lets say in a school with 250 students, 100 are boys, it means that the percentage of boys in school is 40 %