-91% is the change from 711 to 64
Calculation steps:
[( 64 - 711 ) ÷ 711] x 100 = -91%
Formula
Percentage change = [(64 - 711) / 711] x 100
Subtract the new number by the original number
64 - 711 = -647
-647 ÷ 711 = -0.909985935302391
-0.909985935302391 x 100 = -91%