6315.38% is the change from 13 to 834
Calculation steps:
[( 834 - 13 ) ÷ 13] x 100 = 6315.38%
Formula
Percentage change = [(834 - 13) / 13] x 100
Subtract the new number by the original number
834 - 13 = 821
821 ÷ 13 = 63.15384615384615
63.15384615384615 x 100 = 6315.38%