Convert 4/10 to a decimal. A) 2.5 B) 0.4 C) 0.86 D) 0.32

What you are doing when you “convert a fraction to a decimal”

You are dividing the numerator by the denominator. So $\frac{4}{10}$ means $4 \div 10$.

Divide by 10 (quick shortcut)

Dividing by 10 shifts the decimal point one place to the left:

$$4.0 \div 10 = 0.4$$

So,

$$\frac{4}{10} = 0.4$$

Match it to the answer choices

• A) $2.5$ (too large)
• B) $0.4$ (correct)
• C) $0.86$ (not equal)
• D) $0.32$ (not equal)