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Rational Numbers — MATHS STD 7 — Question

Gujarat BoardEnglish MediumSTD 7MATHSRational Numbers1 Mark
MCQ
Mark $(\checkmark)$ against the correct answer in the following:
$\frac{2}{3}-1\frac{5}{7}=?$
  • A
    $1\frac{1}{21}$
  • ✓
    $-1\frac{1}{21}$
  • C
    $\frac{5}{21}$
  • D
    $\frac{-5}{21}$
✓

Answer

Correct option: B.
$-1\frac{1}{21}$

The correct option is $(b).$
$\frac{2}{3}-1\frac{5}{7}$
$\frac{2}{3}\frac{12}{7}$
LCM of 3 and 7 is 21
$=\frac{14-36}{21}$
$=\frac{-22}{21}$
$=-1\frac{1}{21}$

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