-56.15% is the change from 634 to 278
Calculation steps:
[( 278 - 634 ) ÷ 634] x 100 = -56.15%
Formula
Percentage change = [(278 - 634) / 634] x 100
Subtract the new number by the original number
278 - 634 = -356
-356 ÷ 634 = -0.5615141955835962
-0.5615141955835962 x 100 = -56.15%