-29.11% is the change from 907 to 643
Calculation steps:
[( 643 - 907 ) ÷ 907] x 100 = -29.11%
Formula
Percentage change = [(643 - 907) / 907] x 100
Subtract the new number by the original number
643 - 907 = -264
-264 ÷ 907 = -0.29106945975744214
-0.29106945975744214 x 100 = -29.11%