121.89% is the change from 370 to 821
Calculation steps:
[( 821 - 370 ) ÷ 370] x 100 = 121.89%
Formula
Percentage change = [(821 - 370) / 370] x 100
Subtract the new number by the original number
821 - 370 = 451
451 ÷ 370 = 1.218918918918919
1.218918918918919 x 100 = 121.89%