3057.14% is the change from 7 to 221
Calculation steps:
[( 221 - 7 ) ÷ 7] x 100 = 3057.14%
Formula
Percentage change = [(221 - 7) / 7] x 100
Subtract the new number by the original number
221 - 7 = 214
214 ÷ 7 = 30.571428571428573
30.571428571428573 x 100 = 3057.14%