66.36% is the change from 550 to 915
Calculation steps:
[( 915 - 550 ) ÷ 550] x 100 = 66.36%
Formula
Percentage change = [(915 - 550) / 550] x 100
Subtract the new number by the original number
915 - 550 = 365
365 ÷ 550 = 0.6636363636363637
0.6636363636363637 x 100 = 66.36%