-78.55% is the change from 634 to 136
Calculation steps:
[( 136 - 634 ) ÷ 634] x 100 = -78.55%
Formula
Percentage change = [(136 - 634) / 634] x 100
Subtract the new number by the original number
136 - 634 = -498
-498 ÷ 634 = -0.7854889589905363
-0.7854889589905363 x 100 = -78.55%