-78.86% is the change from 634 to 134
Calculation steps:
[( 134 - 634 ) ÷ 634] x 100 = -78.86%
Formula
Percentage change = [(134 - 634) / 634] x 100
Subtract the new number by the original number
134 - 634 = -500
-500 ÷ 634 = -0.7886435331230284
-0.7886435331230284 x 100 = -78.86%