-91.07% is the change from 907 to 81
Calculation steps:
[( 81 - 907 ) ÷ 907] x 100 = -91.07%
Formula
Percentage change = [(81 - 907) / 907] x 100
Subtract the new number by the original number
81 - 907 = -826
-826 ÷ 907 = -0.9106945975744212
-0.9106945975744212 x 100 = -91.07%