-85.58% is the change from 624 to 90
Calculation steps:
[( 90 - 624 ) ÷ 624] x 100 = -85.58%
Formula
Percentage change = [(90 - 624) / 624] x 100
Subtract the new number by the original number
90 - 624 = -534
-534 ÷ 624 = -0.8557692307692307
-0.8557692307692307 x 100 = -85.58%