256.56% is the change from 221 to 788
Calculation steps:
[( 788 - 221 ) ÷ 221] x 100 = 256.56%
Formula
Percentage change = [(788 - 221) / 221] x 100
Subtract the new number by the original number
788 - 221 = 567
567 ÷ 221 = 2.565610859728507
2.565610859728507 x 100 = 256.56%