Question

The product of two rational numbers is 3/8. If one of the number is 2/5 , find the other number.

Answer 1

Step-by-step explanation:

—Let the unknown number is x, so we can write the equation like below.

$\frac{2}{5} \times x = \frac{3}{8}$

$\:$

—Find x.

$\frac{2}{5} \times x = \frac{3}{8}$

$x = \frac{3}{8} \div \frac{2}{5}$

$x = \frac{3}{8} \times \frac{5}{2}$

$x = \frac{15}{16}$

$\:$

—Let's prove that it's true.

$\frac{2}{5} \times x = \frac{3}{8}$

$\frac{2}{5} \times \frac{15}{16} = \frac{3}{8}$

$\frac{30}{80} = \frac{3}{8}$

$\frac{30 \div 10}{80 \div 10} = \frac{3}{8}$

$\frac{3}{8} = \frac{3}{8} \: \: \text{proved}$

$\:$

So, the other number or the value of x is $\frac{15}{16}$

Answer 2

Answer:

if i subtract 3/8 with 2/5 i get 1/40

Step-by-step explanation:

i dont know if this is correct but it seems so