Question

The strength of a school increased by 20% in one year, and decreased by 20% in
the next year. Is the final strength greater or less than the original one, and by
how much per cent ?​

Answer 1

Answer:

Hey Buddy..:)

Explanation:

Let strength be 100%

Strength increased in 1st year = 100% + 20% = 120%

Strength in 2nd year = 20% of 120 = 24%

Final strength = 100% - ( 120 - 24 )%

= 100% - 96% = 4%

So the final strength is less than the original strength by 4%

Hope that helps...

Bye... :)