A $40 item is 70% off. What is the sale price?

The sale price is $12. You save $28.

40 \times 0.3 = 12

How to work it out

1
The original price is $40 and the discount is 70%.
2
Method 1: find the discount, then subtract it.
$70\% \text{ of } 40 = 0.7 \times 40 = 28\qquad 40 - 28 = 12$
3
Method 2: you pay 30% of the price, so multiply by 0.3:
$40 \times 0.3 = 12$
4
Answer: the sale price is $12 and you save $28.

LaTeX source of the formulas on this page

\[ 40 \times 0.3 = 12 \]
\[ 70\% \text{ of } 40 = 0.7 \times 40 = 28\qquad 40 - 28 = 12 \]

What is 70% off $40?

The sale price is $12. You save $28.

How do I find the sale price quickly?

Multiply the price by 0.3 (that is 100% − 70%).