Combo meals originally sell for $7.94 and are now on sale at 10% off. What is the cost of the meal after the discount is deducted?

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Answer 1 · 2016-04-14T16:12:52

$ $7.146$ $7.146$

Formula is $D = P \cdot R$ $D = P*R$

Where:
$D$ $D$ = Discount Price
$P$ $P$ = Original Price
$R$ $R$ = Rate of Discount

Plugging All the Values:

We need to convert the 10% (Percentage to Decimal), Just simply remove the percentage sign then divide by 100. We get 10/100 = 0.10 or 0.1

$D = 7.94 \cdot 0.10$ $D = 7.94 * 0.10$

$D = 0.794$ $D = 0.794$

$D i s c o u n t e d P r i c e$ $Discounted Price$ = Original Price - Discount Price

Discounted Price = 7.94 - 0.794

= $ $7.164$ $7.164$

Answer 2 · 2016-04-14T16:23:42

$$ 7.15$ $$7.15$

10% is just another way of writing $\frac{10}{100}$ $10/100$

Considering the question a bit at a time

10% of $7.94 is $\frac{10}{100} \times 7.94 = 0.794$ $10/100xx7.94 = 0.794" "$ ( in dollars)

So the price after reduction is $$ (7.94 - 0.794) = $ 7.146$ $$(7.94 - 0.794) = $7.146$

Rounding this to 2 decimal places gives

$$ 7.15$ $" "$7.15$
'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Doing the whole thing in one go:

$$ 7.94 (1 - \frac{10}{100}) = $ 7.146$ $" "$7.94(1-10/100)=$7.146$