-29.01% is the change from 910 to 646
Calculation steps:
[( 646 - 910 ) ÷ 910] x 100 = -29.01%
Formula
Percentage change = [(646 - 910) / 910] x 100
Subtract the new number by the original number
646 - 910 = -264
-264 ÷ 910 = -0.29010989010989013
-0.29010989010989013 x 100 = -29.01%