339.04% is the change from 187 to 821
Calculation steps:
[( 821 - 187 ) ÷ 187] x 100 = 339.04%
Formula
Percentage change = [(821 - 187) / 187] x 100
Subtract the new number by the original number
821 - 187 = 634
634 ÷ 187 = 3.390374331550802
3.390374331550802 x 100 = 339.04%