Oscar has 310 ml of oil. He needs 21% of it for a recipe. We need to find how much oil he needs in milliliters.

1. Problem Description

Oscar has 310 ml of oil. He needs 21% of it for a recipe. We need to find how much oil he needs in milliliters.

2. Solution Steps

To find 21% of 310, we multiply 310 by 21% which is the same as $310 \times \frac{21}{100}$.

$310 \times \frac{21}{100} = \frac{310 \times 21}{100} = \frac{6510}{100} = 65.1$

3. Final Answer

Oscar needs 65.1 ml of oil.