📚 Real-World Applications
Percentages are everywhere in daily life. Let's practice with realistic scenarios!
🛒 Shopping: Double Discounts
A $100 item has 20% off, then an additional 15% off the sale price.
1
First discount: $100 × 0.80 = $80
2
Second discount: $80 × 0.85 = $68
Total savings: $32 (32%), not 35%!
💳 Calculating Tips
Quick method for 15% tip on a $48 bill:
1
10% = $4.80
2
5% = half of 10% = $2.40
3
15% = $4.80 + $2.40 = $7.20
🎯 Try It Yourself
Try It Yourself
A $250 TV has a 30% discount. You have an extra 10% off coupon. What's the final price?
First discount: $250 × 0.70 = $175. Then apply 10% off: $175 × 0.90
📝 Final Quiz
0 / 3
Test what you learned. Pick the correct answer for each question.
1. A $40 meal with 18% tip — total to pay?
Explanation:
$40 + ($40 × 0.18) = $40 + $7.20 = $47.20.
2. A $25 shirt has 7% sales tax. Final cost?
Explanation:
$25 × 1.07 = $26.75.
3. You buy a $1,200 item with 15% off and add 8% tax. Final price?
Explanation:
$1,200 × 0.85 × 1.08 = $1,101.60.
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