-90.85% is the change from 667 to 61
Calculation steps:
[( 61 - 667 ) ÷ 667] x 100 = -90.85%
Formula
Percentage change = [(61 - 667) / 667] x 100
Subtract the new number by the original number
61 - 667 = -606
-606 ÷ 667 = -0.9085457271364318
-0.9085457271364318 x 100 = -90.85%