Question

2/5 + 1/8 - 3/10 + 3/4

Answer 1

Answer:

39/40

Step-by-step explanation:

L.C.M OF 5,8,10 AND 4 =  40

$\frac{2}{5}$ = $\frac{2*8}{5*8}$ = $\frac{16}{40}$

$\frac{1}{8} =\frac{1*5}{8*5} =\frac{8}{40}$

$\frac{3}{10} =\frac{3*4}{10*4} =\frac{12}{40}$

$\frac{3}{4} =\frac{3*10}{4*10} =\frac{30}{40}$

NOW, $\frac{16}{40} +\frac{5}{40} -\frac{12}{40} +\frac{30}{40}$

        = $\frac{16+5-12+30}{40}$

        = $\frac{39}{40}$