simple maths

Q.

You run your own company.
Profit in 2001 decreased by 50% compared to the previous year’s profit.
Profit in 2002 increase by 50% compared to the previous year’s profit.
Does this mean that profit in 2002 increased to the same level as profit in 2000?

A.

No , profit in 2002 is 75% of profit in 2000.

For example :

Profit in 2000 is 10,000.
Profit in 2001 is 10,000 * 0.5 = 5,000
Profit in 2002 is 5,000 * 1.5 =  7,500

( 7,500 / 10,000 ) * 100 = 75%

Thx for reading :)