0.4186
10 percent off 139.99 is 14.
20% off 14 = 14 - (0.20 x 14) = 11.2
50% off of 14 = 14 - (0.5 x 14) = 7
$14 bucks off.
14
171.99
41.95 - 14% = 36.08
$11.90 is $14 with 15% off. [ 100%-15% = 85%; 85% X $14 = $11.90. ]
$11.20
40% of 35 is 14 and so 35-14 = 21
5.70 off, leaving 32.30
You would take 6 off to get 14.