871.57% is the change from 102 to 991
Calculation steps:
[( 991 - 102 ) ÷ 102] x 100 = 871.57%
Formula
Percentage change = [(991 - 102) / 102] x 100
Subtract the new number by the original number
991 - 102 = 889
889 ÷ 102 = 8.715686274509803
8.715686274509803 x 100 = 871.57%