Question

In Mr. lee’s class, 40% of the students turned in their biographies. How many students are in Mr. Lee’s class if eight turned in their biographies.

Answer 1

20 students are in Mr. Lee's class

Explanation:

Use ratio.

NB : 100% is total number of students

40% : 8 students

100% : ?

If more, less divides

Then, cancel out the denominator with the HCF of the numerator (100 or 8) and the denominator (40)

Therefore,

= 100 / 40 × 8

= 10 / 4 × 8

= 10 × 2

= 20