-90.7% is the change from 710 to 66
Calculation steps:
[( 66 - 710 ) ÷ 710] x 100 = -90.7%
Formula
Percentage change = [(66 - 710) / 710] x 100
Subtract the new number by the original number
66 - 710 = -644
-644 ÷ 710 = -0.9070422535211268
-0.9070422535211268 x 100 = -90.7%