Find value of 4/7 + 5/8

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A67/56

B56/67

C20/56

D48/67

Answer:

a/x + b/y = (ay+bx)/xy 4/7 + 5/8 = (4 x 8 + 5 x 7) / 7 x 8 = (32+35)/56 = 67/56

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Find the value of ‘?’ in the following question?

$\frac{1}{4}\times{\frac{1}{5}}\div{\frac{1}{8}}+\frac{4}{5}\times\frac{1}{2}\div\frac{2}{3}=?$