Question

Solve the following
There are 500 students in the school in Dahihanda village. If 350 of them can swim, what percent of them can swim and what percent cannot?

Answer 1

Total number of students in the school = 500
Number of students who can swim = 350
Suppose the students who can swim be x%. Let us write in two forms, the ratio of the number of students who can swim to the total number of students in the school, obtain an equation and solve it. Then, we have
$\frac{x}{100}=\frac{350}{500}$
⇒$\frac{x}{100}\times 100=\frac{350}{500}\times 100$
⇒x = 70
∴ Percentage of students who can swim is 70%.
Now, percentage of students who can not swim = (100 − 70)% = 30%