278.95% is the change from 171 to 648
Calculation steps:
[( 648 - 171 ) ÷ 171] x 100 = 278.95%
Formula
Percentage change = [(648 - 171) / 171] x 100
Subtract the new number by the original number
648 - 171 = 477
477 ÷ 171 = 2.789473684210526
2.789473684210526 x 100 = 278.95%