-30.92% is the change from 912 to 630
Calculation steps:
[( 630 - 912 ) ÷ 912] x 100 = -30.92%
Formula
Percentage change = [(630 - 912) / 912] x 100
Subtract the new number by the original number
630 - 912 = -282
-282 ÷ 912 = -0.3092105263157895
-0.3092105263157895 x 100 = -30.92%