-51.5% is the change from 633 to 307
Calculation steps:
[( 307 - 633 ) ÷ 633] x 100 = -51.5%
Formula
Percentage change = [(307 - 633) / 633] x 100
Subtract the new number by the original number
307 - 633 = -326
-326 ÷ 633 = -0.5150078988941548
-0.5150078988941548 x 100 = -51.5%