-31% is the change from 913 to 630
Calculation steps:
[( 630 - 913 ) ÷ 913] x 100 = -31%
Formula
Percentage change = [(630 - 913) / 913] x 100
Subtract the new number by the original number
630 - 913 = -283
-283 ÷ 913 = -0.3099671412924425
-0.3099671412924425 x 100 = -31%