You need 1 1/4
cups of sugar to make 20 cookies

To make 14 cookies, you will need
cups of sugar.

11/4 = 5/4

If you need 5/4 cups of sugar to make 20 cookies or in other words,

For 20 cookies you need 5/4 cups of sugar then

for 14 cookies you will need: 14 * (5/4)/20 = 7/8 cups of cookies

if you like a very sweet cookies then you can add a bit more sugar to make it 1 full cup of suger

109 is the nearest whole number/final answer! : )