subtraction using Brahmagupta’s method: 5 6 -4 9 - Vidyadip

Question

subtraction using Brahmagupta’s method:
$\frac{5}{6}-\frac{4}{9}$

✓

Answer

Given $\frac{5}{6}-\frac{4}{9}$
Hence LCM of 6 and 9 is 18. Fractional unit for both fractions should be $\frac{1}{18}$ then
$\begin{array}{l}\frac{5 \times 3}{6 \times 3}-\frac{4 \times 2}{9 \times 2} \\ =\frac{15}{18}-\frac{8}{18} \\ =\frac{15-8}{18} \\ =\frac{7}{18}\end{array}$

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