719.01% is the change from 121 to 991
Calculation steps:
[( 991 - 121 ) ÷ 121] x 100 = 719.01%
Formula
Percentage change = [(991 - 121) / 121] x 100
Subtract the new number by the original number
991 - 121 = 870
870 ÷ 121 = 7.190082644628099
7.190082644628099 x 100 = 719.01%