3838.1% is the change from 21 to 827
Calculation steps:
[( 827 - 21 ) ÷ 21] x 100 = 3838.1%
Formula
Percentage change = [(827 - 21) / 21] x 100
Subtract the new number by the original number
827 - 21 = 806
806 ÷ 21 = 38.38095238095238
38.38095238095238 x 100 = 3838.1%