172.73% is the change from 308 to 840
Calculation steps:
[( 840 - 308 ) ÷ 308] x 100 = 172.73%
Formula
Percentage change = [(840 - 308) / 308] x 100
Subtract the new number by the original number
840 - 308 = 532
532 ÷ 308 = 1.7272727272727273
1.7272727272727273 x 100 = 172.73%