77.09% is the change from 550 to 974
Calculation steps:
[( 974 - 550 ) ÷ 550] x 100 = 77.09%
Formula
Percentage change = [(974 - 550) / 550] x 100
Subtract the new number by the original number
974 - 550 = 424
424 ÷ 550 = 0.7709090909090909
0.7709090909090909 x 100 = 77.09%