-91.9% is the change from 667 to 54
Calculation steps:
[( 54 - 667 ) ÷ 667] x 100 = -91.9%
Formula
Percentage change = [(54 - 667) / 667] x 100
Subtract the new number by the original number
54 - 667 = -613
-613 ÷ 667 = -0.9190404797601199
-0.9190404797601199 x 100 = -91.9%