3938.1% is the change from 21 to 848
Calculation steps:
[( 848 - 21 ) ÷ 21] x 100 = 3938.1%
Formula
Percentage change = [(848 - 21) / 21] x 100
Subtract the new number by the original number
848 - 21 = 827
827 ÷ 21 = 39.38095238095238
39.38095238095238 x 100 = 3938.1%