im pretty sure all u do is use a proportion
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By dividing the numerator and denominator by their HCF
Simplifying the fraction.
First convert the mixed numbers into "top heavy (or "improper) fractions". Now multiply each of the improper fractions by each other - this makes the denominators the same. Now you can add both the fractions together (and cancel down if necessary).
To add fractions with the same denominators, simply add together the numerators, and cancel down if necessary. For example, 5/8 + 1/8 = 6/8. Cancelling this down to an improper fraction in its simplest form, this is equal to 3/4.
1/2 & 3/8 This is multiplication of fractions. 1/2 X 3/8 This does NOT cancel down Hence 3/16 The answer!!!!!