-51.58% is the change from 634 to 307
Calculation steps:
[( 307 - 634 ) ÷ 634] x 100 = -51.58%
Formula
Percentage change = [(307 - 634) / 634] x 100
Subtract the new number by the original number
307 - 634 = -327
-327 ÷ 634 = -0.5157728706624606
-0.5157728706624606 x 100 = -51.58%