41.18% is the change from 170 to 240
Calculation steps:
[( 240 - 170 ) ÷ 170] x 100 = 41.18%
Formula
Percentage change = [(240 - 170) / 170] x 100
Subtract the new number by the original number
240 - 170 = 70
70 ÷ 170 = 0.4117647058823529
0.4117647058823529 x 100 = 41.18%