342.53% is the change from 221 to 978
Calculation steps:
[( 978 - 221 ) ÷ 221] x 100 = 342.53%
Formula
Percentage change = [(978 - 221) / 221] x 100
Subtract the new number by the original number
978 - 221 = 757
757 ÷ 221 = 3.425339366515837
3.425339366515837 x 100 = 342.53%