Question

at the grocery store, jemica spends $68.17 on food (taxed at %2) and 18.37 on the other groceries (taxed at 7%) what is her total bill?

Answer 1

Percentages

There are two expenses: food and groceries.

Food bill

Jemica spends $68.17 + taxes on food. We know the taxes are the 2% of $68.17. We want to find how much money corresponds to 2%. We have the following equivalence:

2% ⇄ ??

100% ⇄ $68.17

If we divide both sides of the equivalence we will have the same result:

`(2)/(100)=\frac{?\text{?}}{68.17}`

We multiply both sides of the equation by 68.17:

`\begin{gathered} 68.17\cdot(2)/(100)=?\text{?} \\ 1.3634=\text{??} \\ ??\approx1.36 \end{gathered}`

Then, Jemica spends

$68.17 + taxes = $68.17 + $1.36 = $69.53

Groceries bill

Similarly, we have that Jemica spends $18.37 + taxes on groceries. We know the taxes are the 7% of $18.37. We want to find how much money corresponds to 7%. We have the following equivalence:

7% ⇄ ??

100% ⇄ $18.37

If we divide both sides of the equivalence we will have the same result:

`\begin{gathered} (7)/(100)=\frac{?\text{?}}{18.37} \\ \downarrow \\ 18.37\cdot(7)/(100)=\text{??} \\ 1.2859=\text{??} \\ \text{??}\approx1.28 \end{gathered}`

Then, Jemica spends

$18.37 + taxes = $18.37 + $1.28 = $19.65

Total bill

Then Jemica's total bill is

food + groceries = $69.53 + $ 19.65 = $89.18

Answer: Jemica's total bill is $89.18