-79.49% is the change from 663 to 136
Calculation steps:
[( 136 - 663 ) ÷ 663] x 100 = -79.49%
Formula
Percentage change = [(136 - 663) / 663] x 100
Subtract the new number by the original number
136 - 663 = -527
-527 ÷ 663 = -0.7948717948717948
-0.7948717948717948 x 100 = -79.49%