83.67% is the change from 447 to 821
Calculation steps:
[( 821 - 447 ) ÷ 447] x 100 = 83.67%
Formula
Percentage change = [(821 - 447) / 447] x 100
Subtract the new number by the original number
821 - 447 = 374
374 ÷ 447 = 0.8366890380313199
0.8366890380313199 x 100 = 83.67%