-30.97% is the change from 917 to 633
Calculation steps:
[( 633 - 917 ) ÷ 917] x 100 = -30.97%
Formula
Percentage change = [(633 - 917) / 917] x 100
Subtract the new number by the original number
633 - 917 = -284
-284 ÷ 917 = -0.30970556161395857
-0.30970556161395857 x 100 = -30.97%