85.75% is the change from 442 to 821
Calculation steps:
[( 821 - 442 ) ÷ 442] x 100 = 85.75%
Formula
Percentage change = [(821 - 442) / 442] x 100
Subtract the new number by the original number
821 - 442 = 379
379 ÷ 442 = 0.8574660633484162
0.8574660633484162 x 100 = 85.75%