3170% is the change from 30 to 981
Calculation steps:
[( 981 - 30 ) ÷ 30] x 100 = 3170%
Formula
Percentage change = [(981 - 30) / 30] x 100
Subtract the new number by the original number
981 - 30 = 951
951 ÷ 30 = 31.7
31.7 x 100 = 3170%
Example