Answer:[tex]\frac{19}{20} - \frac{10}{20} - \frac{2}{20}[/tex]
[tex]\frac{7}{20}[/tex]
Step-by-step explanation:
Since the Least Common Denominator is 20 (or the biggest number on the bottom in your case), you can multiply 4 and 10 by their corresponding number to get 20.
4 * 5 = 20
10 * 2 = 20
Now multiply the top and bottom by 5 and 2
[tex]\frac{5}{5} *\frac{2}{4}[/tex] = [tex]\frac{10}{20}
[tex]\frac{2}{2} *\frac{1}{10}[/tex] = [tex]\frac{2}{20}
Now subtract everything.
[tex]\frac{19}{20} - \frac{10}{20} - \frac{2}{20}[/tex]
Its equals [tex]\frac{7}{20}[/tex] .
