Maliha has 320 ml of water in a jug. She uses 21% of it for a recipe. How much wate...
Check the final answer first, then review the worked steps.
Problem
Maliha has 320 ml of water in a jug. She uses 21% of it for a recipe. How much water does she use?
Answer
\(67.2 \text{ ml}\)
Step-by-step solution
1. Understand the problem: We need to find $21\%$ of $320 \text{ ml}$ to determine how much water is used for the recipe.
2. Convert the percentage to a decimal: To calculate a percentage of a number, convert the percentage to a decimal by dividing by $100$. So, $21\% = \frac{21}{100} = 0.21$.
3. Calculate the amount used: Multiply the total amount of water by the decimal representation of the percentage: $320 \times 0.21$.
4. Perform the multiplication:
$$320 \times 0.21 = 320 \times \frac{21}{100} = \frac{320 \times 21}{100} = \frac{6720}{100} = 67.2$$
5. Final result: The amount of water used is $67.2 \text{ ml}$.