247.51% is the change from 221 to 768
Calculation steps:
[( 768 - 221 ) ÷ 221] x 100 = 247.51%
Formula
Percentage change = [(768 - 221) / 221] x 100
Subtract the new number by the original number
768 - 221 = 547
547 ÷ 221 = 2.475113122171946
2.475113122171946 x 100 = 247.51%