166.27% is the change from 83 to 221
Calculation steps:
[( 221 - 83 ) ÷ 83] x 100 = 166.27%
Formula
Percentage change = [(221 - 83) / 83] x 100
Subtract the new number by the original number
221 - 83 = 138
138 ÷ 83 = 1.6626506024096386
1.6626506024096386 x 100 = 166.27%