643.24% is the change from 74 to 550
Calculation steps:
[( 550 - 74 ) ÷ 74] x 100 = 643.24%
Formula
Percentage change = [(550 - 74) / 74] x 100
Subtract the new number by the original number
550 - 74 = 476
476 ÷ 74 = 6.4324324324324325
6.4324324324324325 x 100 = 643.24%