153.4% is the change from 324 to 821
Calculation steps:
[( 821 - 324 ) ÷ 324] x 100 = 153.4%
Formula
Percentage change = [(821 - 324) / 324] x 100
Subtract the new number by the original number
821 - 324 = 497
497 ÷ 324 = 1.5339506172839505
1.5339506172839505 x 100 = 153.4%