-29.35% is the change from 913 to 645
Calculation steps:
[( 645 - 913 ) ÷ 913] x 100 = -29.35%
Formula
Percentage change = [(645 - 913) / 913] x 100
Subtract the new number by the original number
645 - 913 = -268
-268 ÷ 913 = -0.29353778751369114
-0.29353778751369114 x 100 = -29.35%