Question

Ivan's chocolate bar is 21% cocoa. If the weight of the chocolate bar is 84 grams, how many grams of cocoa does it contain? ROUND TO THE NEAREST 10TH

Answer 1

The weight of the chocolate is

`=84g`

The percentage of cocoa is

`\begin{gathered} =21\% \\ =(21)/(100) \end{gathered}`

To figure out the grams of cocoa it contains, we will use the formula below

`Amount_(cocoa)=Percentage_(cocoa)* amount_(chocolate)`

By substituting the values, we will have

`\begin{gathered} Amount_(cocoa)=Percentage_(cocoa*)amount_(chocolate) \\ Amount_(cocoa)=(21)/(100)*84g \\ Amount_(cocoa)=17.64g \\ Amount_(cocoa)\approx17.6g \end{gathered}`

Hence,

The amount of cocoa to the nearest tenth is

`\Rightarrow17.6g`