Question

A number increased by 20 % gives 30 .

Answer 1

Answer:

The required number is 25

Step-by-step explanation:

Let the required number be x

when x is increased by 20%, it becomes 30

That is,

$x+(x*\frac{20}{100})=30\\\\x+(x*\frac{1}{5})=30\\\\x+\frac{x}{5}=30\\\\\frac{5x+x}{5}=30\\\\\frac{6x}{5}=30\\\\6x=150\\\\x =\frac{150}{6}\\\\x=25$