-31.01% is the change from 919 to 634
Calculation steps:
[( 634 - 919 ) ÷ 919] x 100 = -31.01%
Formula
Percentage change = [(634 - 919) / 919] x 100
Subtract the new number by the original number
634 - 919 = -285
-285 ÷ 919 = -0.3101196953210011
-0.3101196953210011 x 100 = -31.01%