-47.79% is the change from 634 to 331
Calculation steps:
[( 331 - 634 ) ÷ 634] x 100 = -47.79%
Formula
Percentage change = [(331 - 634) / 634] x 100
Subtract the new number by the original number
331 - 634 = -303
-303 ÷ 634 = -0.47791798107255523
-0.47791798107255523 x 100 = -47.79%