-55.9% is the change from 907 to 400
Calculation steps:
[( 400 - 907 ) ÷ 907] x 100 = -55.9%
Formula
Percentage change = [(400 - 907) / 907] x 100
Subtract the new number by the original number
400 - 907 = -507
-507 ÷ 907 = -0.5589856670341786
-0.5589856670341786 x 100 = -55.9%