3700% is the change from 21 to 798
Calculation steps:
[( 798 - 21 ) ÷ 21] x 100 = 3700%
Formula
Percentage change = [(798 - 21) / 21] x 100
Subtract the new number by the original number
798 - 21 = 777
777 ÷ 21 = 37
37 x 100 = 3700%
Example