54.73% is the change from 550 to 851
Calculation steps:
[( 851 - 550 ) ÷ 550] x 100 = 54.73%
Formula
Percentage change = [(851 - 550) / 550] x 100
Subtract the new number by the original number
851 - 550 = 301
301 ÷ 550 = 0.5472727272727272
0.5472727272727272 x 100 = 54.73%