74.36% is the change from 550 to 959
Calculation steps:
[( 959 - 550 ) ÷ 550] x 100 = 74.36%
Formula
Percentage change = [(959 - 550) / 550] x 100
Subtract the new number by the original number
959 - 550 = 409
409 ÷ 550 = 0.7436363636363637
0.7436363636363637 x 100 = 74.36%