Question

a new health drink has 180% of the recommended daily allowance (rda) for a certain vitamin. the rda for this vitamin is 20 mg. how many milligrams of the vitamin are in the drink? there are □ mg of the vitamin in the drink.

Explanation:

Step1: Identify the formula for percentage calculation

We know that if a value $x$ is $p\%$ of a number $y$, then $x = p\%\times y$. Here, $p = 180$ and $y=20$.

Step2: Convert the percentage to a decimal

To calculate $180\%$ of 20, we first convert $180\%$ to a decimal. $180\%=\frac{180}{100}=1.8$.

Step3: Calculate the amount of vitamin

We multiply the decimal - equivalent of the percentage by the RDA value. So, the amount of vitamin in the drink is $1.8\times20$.
$1.8\times20 = 36$

Answer:

36