Question

The crop yield increased by 20% previous year and decreased by 15% the current year. What is the effective change in crop yield?

Answer 1

Let the crop yield be x
20% of x = 20x/100 = x/5
Now, the crop yield = x + x/5
= 6x/5
Again, 15% of 6x/5 = (15/100) x (6x/5)
= 9x/100
Final crop yield = (6x/5) - (9x/100) = 111x/100
Now, effective change in crop yield = (111x/100) - x
= 11x/100
Required percentage change = 11%
=