-30.89% is the change from 913 to 631
Calculation steps:
[( 631 - 913 ) ÷ 913] x 100 = -30.89%
Formula
Percentage change = [(631 - 913) / 913] x 100
Subtract the new number by the original number
631 - 913 = -282
-282 ÷ 913 = -0.3088718510405257
-0.3088718510405257 x 100 = -30.89%