176.32% is the change from 304 to 840
Calculation steps:
[( 840 - 304 ) ÷ 304] x 100 = 176.32%
Formula
Percentage change = [(840 - 304) / 304] x 100
Subtract the new number by the original number
840 - 304 = 536
536 ÷ 304 = 1.763157894736842
1.763157894736842 x 100 = 176.32%