57.45% is the change from 550 to 866
Calculation steps:
[( 866 - 550 ) ÷ 550] x 100 = 57.45%
Formula
Percentage change = [(866 - 550) / 550] x 100
Subtract the new number by the original number
866 - 550 = 316
316 ÷ 550 = 0.5745454545454546
0.5745454545454546 x 100 = 57.45%