Answer:
3/4
Step-by-step explanation:
Q = [tex]\frac{7}{10} +\frac{1}{4} -\frac{1}{5}[/tex]
{the smallest common multiple of 10, 4 and 5 is 5×2×2 = 20 (denominator)}
Q =[tex]\frac{7×2}{10×2} +\frac{1×5}{4×5} -\frac{1×4}{5×4}[/tex]
=[tex]\frac{14}{20} +\frac{5}{20} -\frac{4}{20}[/tex]
=[tex]\frac{14+5-4}{20}[/tex]
=[tex]\frac{15}{20}[/tex]
=[tex]\frac{3×5}{4×5}[/tex]
=[tex]\frac{3}{4}[/tex]
