1100% is the change from 81 to 972
Calculation steps:
[( 972 - 81 ) ÷ 81] x 100 = 1100%
Formula
Percentage change = [(972 - 81) / 81] x 100
Subtract the new number by the original number
972 - 81 = 891
891 ÷ 81 = 11
11 x 100 = 1100%
Example