73.64% is the change from 550 to 955
Calculation steps:
[( 955 - 550 ) ÷ 550] x 100 = 73.64%
Formula
Percentage change = [(955 - 550) / 550] x 100
Subtract the new number by the original number
955 - 550 = 405
405 ÷ 550 = 0.7363636363636363
0.7363636363636363 x 100 = 73.64%