268.78% is the change from 221 to 815
Calculation steps:
[( 815 - 221 ) ÷ 221] x 100 = 268.78%
Formula
Percentage change = [(815 - 221) / 221] x 100
Subtract the new number by the original number
815 - 221 = 594
594 ÷ 221 = 2.6877828054298645
2.6877828054298645 x 100 = 268.78%