Question

As you saved Venus, you are now on your way to save Mars. To open the gate of your rocket, you need to solve a puzzle
$\text{Divide:}20÷\frac{5}{7}$

• A. 26
• B. 27
• C. 28
• D. 29

Answer 1

The correct option is C 28

We can write 20 as $\frac{20}{1}$

$20÷\frac{5}{7}=\frac{20}{1}÷\frac{5}{7}$

Take a reciprocal of the second fraction and multiply with the first fraction as follows

$\frac{20}{1}÷\frac{5}{7}=\frac{20}{1}\times \frac{7}{5}$

$=\frac{20\times 7}{1\times 5}$

$=\frac{4\times 5\times 7}{1\times 5}$

$=\frac{4\times 7}{1}$

$=28$

Hence, $20÷\frac{5}{7}=28$