3190% is the change from 30 to 987
Calculation steps:
[( 987 - 30 ) ÷ 30] x 100 = 3190%
Formula
Percentage change = [(987 - 30) / 30] x 100
Subtract the new number by the original number
987 - 30 = 957
957 ÷ 30 = 31.9
31.9 x 100 = 3190%
Example