-54.99% is the change from 491 to 221
Calculation steps:
[( 221 - 491 ) ÷ 491] x 100 = -54.99%
Formula
Percentage change = [(221 - 491) / 491] x 100
Subtract the new number by the original number
221 - 491 = -270
-270 ÷ 491 = -0.5498981670061099
-0.5498981670061099 x 100 = -54.99%