-29% is the change from 907 to 644
Calculation steps:
[( 644 - 907 ) ÷ 907] x 100 = -29%
Formula
Percentage change = [(644 - 907) / 907] x 100
Subtract the new number by the original number
644 - 907 = -263
-263 ÷ 907 = -0.28996692392502754
-0.28996692392502754 x 100 = -29%