-29.12% is the change from 910 to 645
Calculation steps:
[( 645 - 910 ) ÷ 910] x 100 = -29.12%
Formula
Percentage change = [(645 - 910) / 910] x 100
Subtract the new number by the original number
645 - 910 = -265
-265 ÷ 910 = -0.29120879120879123
-0.29120879120879123 x 100 = -29.12%