163.99% is the change from 311 to 821
Calculation steps:
[( 821 - 311 ) ÷ 311] x 100 = 163.99%
Formula
Percentage change = [(821 - 311) / 311] x 100
Subtract the new number by the original number
821 - 311 = 510
510 ÷ 311 = 1.639871382636656
1.639871382636656 x 100 = 163.99%