Let’s solve each problem step by step.
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Problem 1:
You start with $3500. The interest rate is 3% per year.
Step 1: Find 3% of $3500.
→ 3% = 3/100 = 0.03
→ 0.03 × 3500 = 105
Step 2: Add the interest to the original amount.
→ 3500 + 105 =
$3605
✔ Final Answer for #1:
$3605
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Problem 2:
Laptop normally costs $640. Reduced by 15%.
Step 1: Find 15% of $640.
→ 15% = 0.15
→ 0.15 × 640 = 96
Step 2: Subtract the discount from original price.
→ 640 - 96 =
$544
✔ Final Answer for #2:
$544
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Problem 3:
Tyger scored 28. His score improves by 25%.
Step 1: Find 25% of 28.
→ 25% = 0.25
→ 0.25 × 28 = 7
Step 2: Add improvement to original score.
→ 28 + 7 =
35
✔ Final Answer for #3:
35
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Problem 4:
Frazer cycles 160 miles. Next week he cycles 20% fewer.
Step 1: Find 20% of 160.
→ 20% = 0.20
→ 0.20 × 160 = 32
Step 2: Subtract that from original distance.
→ 160 - 32 =
128 miles
✔ Final Answer for #4:
128 miles
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Problem 5:
Plane at 25,000 ft. Climbs another 40%.
Step 1: Find 40% of 25,000.
→ 40% = 0.40
→ 0.40 × 25,000 = 10,000
Step 2: Add climb to current altitude.
→ 25,000 + 10,000 =
35,000 ft
✔ Final Answer for #5:
35,000 ft
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Problem 6:
Driest month: 2.5 inches. Wettest month had 40% more.
Step 1: Find 40% of 2.5.
→ 40% = 0.40
→ 0.40 × 2.5 = 1.0
Step 2: Add to original rainfall.
→ 2.5 + 1.0 =
3.5 inches
✔ Final Answer for #6:
3.5 inches
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Final Answer:
1) $3605
2) $544
3) 35
4) 128 miles
5) 35,000 ft
6) 3.5 inches
Parent Tip: Review the logic above to help your child master the concept of percentage increase and decrease worksheet pdf.
