Question
subtraction using Brahmagupta’s method:
$\frac{2}{5}-\frac{4}{15}$
$\frac{2}{5}-\frac{4}{15}$
✓
Answer
Given $\frac{2}{5}-\frac{4}{15}$
Here LCM of 5 and 15 is 15. Fractional unit for both fractions should be $\frac{1}{15}$
$\begin{array}{l}\text { then } \frac{2 \times 3}{5 \times 3}-\frac{4 \times 1}{15 \times 1} \\ =\frac{6}{15}-\frac{4}{15} \\ =\frac{6-4}{15} \\ =\frac{2}{15}\end{array}$
Here LCM of 5 and 15 is 15. Fractional unit for both fractions should be $\frac{1}{15}$
$\begin{array}{l}\text { then } \frac{2 \times 3}{5 \times 3}-\frac{4 \times 1}{15 \times 1} \\ =\frac{6}{15}-\frac{4}{15} \\ =\frac{6-4}{15} \\ =\frac{2}{15}\end{array}$
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