155.81% is the change from 215 to 550
Calculation steps:
[( 550 - 215 ) ÷ 215] x 100 = 155.81%
Formula
Percentage change = [(550 - 215) / 215] x 100
Subtract the new number by the original number
550 - 215 = 335
335 ÷ 215 = 1.558139534883721
1.558139534883721 x 100 = 155.81%