![\text{You need }1(1)/(4)\text{ cups of sugar to make 20 cookies }](https://img.qammunity.org/2023/formulas/mathematics/college/3hn9ez42zloxgmtlxjw9f0hwo5ch7fklky.png)
Let us first convert the mixed number into fraction
![1(1)/(4)=((1*4)+1)/(4)=(4+1)/(4)=(5)/(4)](https://img.qammunity.org/2023/formulas/mathematics/college/pf92xxwblqcwqk7h541y8f8pxvf2bnupba.png)
So 5/4 cups of sugar are required to make 20 cookies
To make 14 cookies, we need x cups of sugar.
So, we can write the following proportion
![(x)/(14)=((5)/(4))/(20)](https://img.qammunity.org/2023/formulas/mathematics/college/ox2fqov4khobtz052vr3gbkxvj41pdjest.png)
Finally, let us solve the above equation for x.
![\begin{gathered} (x)/(14)=((5)/(4))/(20) \\ x=((5)/(4))/(20)*14 \\ x=(5)/(4)*(1)/(20)*14 \\ x=(5*1*14)/(4*20) \\ x=(70)/(80) \\ x=(7)/(8) \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/357ckqjzjfoksyvumbu6h634a1iuq4mwrx.png)
Therefore, we need 7/8 cups of sugar to make 14 cookies.