376.47% is the change from 17 to 81
Calculation steps:
[( 81 - 17 ) ÷ 17] x 100 = 376.47%
Formula
Percentage change = [(81 - 17) / 17] x 100
Subtract the new number by the original number
81 - 17 = 64
64 ÷ 17 = 3.764705882352941
3.764705882352941 x 100 = 376.47%