248.42% is the change from 221 to 770
Calculation steps:
[( 770 - 221 ) ÷ 221] x 100 = 248.42%
Formula
Percentage change = [(770 - 221) / 221] x 100
Subtract the new number by the original number
770 - 221 = 549
549 ÷ 221 = 2.484162895927602
2.484162895927602 x 100 = 248.42%