-30.69% is the change from 919 to 637
Calculation steps:
[( 637 - 919 ) ÷ 919] x 100 = -30.69%
Formula
Percentage change = [(637 - 919) / 919] x 100
Subtract the new number by the original number
637 - 919 = -282
-282 ÷ 919 = -0.3068552774755169
-0.3068552774755169 x 100 = -30.69%