Gujarat BoardEnglish MediumSTD 7MATHSRational Numbers1 Mark
MCQ
$\frac{-7}{13}-\Big(\frac{-8}{15}\Big)=$
A
$-\frac{239}{195}$
B
$\frac{29}{195}$
C
$\frac{-29}{195}$
✓
None of these.
✓
Answer
Correct option: D.
None of these.
$\frac{-7}{13}-\Big(\frac{-8}{15}\Big)$
$=\frac{-7}{13}+\frac{8}{15}$ $\Big[-\Big(\frac{-8}{15}\Big)=\frac{8}{15}\Big]$
$=\frac{-7\times15+8\times13}{195}$ $(LCM$ of $13$ and $15 = 195)$
$=\frac{-105+104}{195}$
$=\frac{-1}{195}$
Hence, the correct answer is option $(d).$
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