1098.77% is the change from 81 to 971
Calculation steps:
[( 971 - 81 ) ÷ 81] x 100 = 1098.77%
Formula
Percentage change = [(971 - 81) / 81] x 100
Subtract the new number by the original number
971 - 81 = 890
890 ÷ 81 = 10.987654320987655
10.987654320987655 x 100 = 1098.77%