65.45% is the change from 550 to 910
Calculation steps:
[( 910 - 550 ) ÷ 550] x 100 = 65.45%
Formula
Percentage change = [(910 - 550) / 550] x 100
Subtract the new number by the original number
910 - 550 = 360
360 ÷ 550 = 0.6545454545454545
0.6545454545454545 x 100 = 65.45%