77.82% is the change from 550 to 978
Calculation steps:
[( 978 - 550 ) ÷ 550] x 100 = 77.82%
Formula
Percentage change = [(978 - 550) / 550] x 100
Subtract the new number by the original number
978 - 550 = 428
428 ÷ 550 = 0.7781818181818182
0.7781818181818182 x 100 = 77.82%