-40.38% is the change from 634 to 378
Calculation steps:
[( 378 - 634 ) ÷ 634] x 100 = -40.38%
Formula
Percentage change = [(378 - 634) / 634] x 100
Subtract the new number by the original number
378 - 634 = -256
-256 ÷ 634 = -0.4037854889589905
-0.4037854889589905 x 100 = -40.38%