Question

20% of all the children in a class are left handed.

Answer 1

Answer:

There are 20 students in the class

Step-by-step explanation:

Let the total number of children in the class be = x

from the question, we know that 20% of all the children are left-handed. We also know that 20% of the total children in the class = 4.

This means that 20% of  x = 4

Wherever we see the word "of" in an arithmetic problem, we should know that it infers a multiplication there.

Hence, we have

$\frac{20}{100} \times x = 4$

$x = \frac{4 \times 100}{20}= 20$

There are 20 children in the class altogether