-79.61% is the change from 667 to 136
Calculation steps:
[( 136 - 667 ) ÷ 667] x 100 = -79.61%
Formula
Percentage change = [(136 - 667) / 667] x 100
Subtract the new number by the original number
136 - 667 = -531
-531 ÷ 667 = -0.7961019490254873
-0.7961019490254873 x 100 = -79.61%