288.24% is the change from 17 to 66
Calculation steps:
[( 66 - 17 ) ÷ 17] x 100 = 288.24%
Formula
Percentage change = [(66 - 17) / 17] x 100
Subtract the new number by the original number
66 - 17 = 49
49 ÷ 17 = 2.8823529411764706
2.8823529411764706 x 100 = 288.24%