-89.36% is the change from 667 to 71
Calculation steps:
[( 71 - 667 ) ÷ 667] x 100 = -89.36%
Formula
Percentage change = [(71 - 667) / 667] x 100
Subtract the new number by the original number
71 - 667 = -596
-596 ÷ 667 = -0.8935532233883059
-0.8935532233883059 x 100 = -89.36%