76.47% is the change from 221 to 390
Calculation steps:
[( 390 - 221 ) ÷ 221] x 100 = 76.47%
Formula
Percentage change = [(390 - 221) / 221] x 100
Subtract the new number by the original number
390 - 221 = 169
169 ÷ 221 = 0.7647058823529411
0.7647058823529411 x 100 = 76.47%