-55.89% is the change from 501 to 221
Calculation steps:
[( 221 - 501 ) ÷ 501] x 100 = -55.89%
Formula
Percentage change = [(221 - 501) / 501] x 100
Subtract the new number by the original number
221 - 501 = -280
-280 ÷ 501 = -0.5588822355289421
-0.5588822355289421 x 100 = -55.89%