243.75% is the change from 160 to 550
Calculation steps:
[( 550 - 160 ) ÷ 160] x 100 = 243.75%
Formula
Percentage change = [(550 - 160) / 160] x 100
Subtract the new number by the original number
550 - 160 = 390
390 ÷ 160 = 2.4375
2.4375 x 100 = 243.75%