$\frac{4}{10}$ as a percent

To convert a decimal into a percent, we need to multiply the decimal by $100$.

Thus, to convert a fraction into a percent, multiply the fraction by $100$ and convert it into a decimal.

Multiply by $100$: $\frac{4}{10}$ becomes $\frac{400}{10}$.

Convert the fraction into a decimal: $\frac{400}{10} = 40\%$ (for steps, see fraction to decimal calculator).

$\frac{4}{10} = 40\%$A