1897.62% is the change from 42 to 839
Calculation steps:
[( 839 - 42 ) ÷ 42] x 100 = 1897.62%
Formula
Percentage change = [(839 - 42) / 42] x 100
Subtract the new number by the original number
839 - 42 = 797
797 ÷ 42 = 18.976190476190474
18.976190476190474 x 100 = 1897.62%