66.91% is the change from 550 to 918
Calculation steps:
[( 918 - 550 ) ÷ 550] x 100 = 66.91%
Formula
Percentage change = [(918 - 550) / 550] x 100
Subtract the new number by the original number
918 - 550 = 368
368 ÷ 550 = 0.6690909090909091
0.6690909090909091 x 100 = 66.91%