-78.77% is the change from 636 to 135
Calculation steps:
[( 135 - 636 ) ÷ 636] x 100 = -78.77%
Formula
Percentage change = [(135 - 636) / 636] x 100
Subtract the new number by the original number
135 - 636 = -501
-501 ÷ 636 = -0.7877358490566038
-0.7877358490566038 x 100 = -78.77%