-29.79% is the change from 913 to 641
Calculation steps:
[( 641 - 913 ) ÷ 913] x 100 = -29.79%
Formula
Percentage change = [(641 - 913) / 913] x 100
Subtract the new number by the original number
641 - 913 = -272
-272 ÷ 913 = -0.29791894852135814
-0.29791894852135814 x 100 = -29.79%