55.3% is the change from 217 to 337
Calculation steps:
[( 337 - 217 ) ÷ 217] x 100 = 55.3%
Formula
Percentage change = [(337 - 217) / 217] x 100
Subtract the new number by the original number
337 - 217 = 120
120 ÷ 217 = 0.5529953917050692
0.5529953917050692 x 100 = 55.3%