126.7% is the change from 221 to 501
Calculation steps:
[( 501 - 221 ) ÷ 221] x 100 = 126.7%
Formula
Percentage change = [(501 - 221) / 221] x 100
Subtract the new number by the original number
501 - 221 = 280
280 ÷ 221 = 1.2669683257918551
1.2669683257918551 x 100 = 126.7%