170.96% is the change from 303 to 821
Calculation steps:
[( 821 - 303 ) ÷ 303] x 100 = 170.96%
Formula
Percentage change = [(821 - 303) / 303] x 100
Subtract the new number by the original number
821 - 303 = 518
518 ÷ 303 = 1.7095709570957096
1.7095709570957096 x 100 = 170.96%