307.24% is the change from 221 to 900
Calculation steps:
[( 900 - 221 ) ÷ 221] x 100 = 307.24%
Formula
Percentage change = [(900 - 221) / 221] x 100
Subtract the new number by the original number
900 - 221 = 679
679 ÷ 221 = 3.072398190045249
3.072398190045249 x 100 = 307.24%