Discount price
Same trick as the last lesson, one step further: a "20% off" sale doesn't
hand you the discount directly, it hands you the price after you subtract
it. Find the discount amount first (price times the percent, as a decimal),
then subtract that from the original price.
The starter expression demonstrates the pattern (10% off $100) - swap in this
lesson's real numbers.
Your task: a jacket costs $89.99. It's 20% off. What's the sale price?
You'll practice:
- Computing a discount amount before subtracting it
- Nesting one calculation inside another with parentheses
Related reading: Probability: Measuring Uncertainty →