Let’s solve each problem one by one. We’ll calculate the percentage increase or decrease, then add or subtract it from the original amount to get the final answer.
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1) Increase $1500 by 35%
First, find 35% of 1500:
35% = 0.35 → 0.35 × 1500 =
525
Now add: 1500 + 525 =
$2025
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2) Decrease $840 by 15%
15% of 840: 0.15 × 840 =
126
Subtract: 840 - 126 =
$714
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3) Increase 820 yards by 70%
70% of 820: 0.70 × 820 =
574
Add: 820 + 574 =
1394 yards
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4) Decrease 52 inches by 25%
25% of 52: 0.25 × 52 =
13
Subtract: 52 - 13 =
39 inches
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5) Increase 72 gallons by 12%
12% of 72: 0.12 × 72 =
8.64
Add: 72 + 8.64 =
80.64 gallons
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6) Increase 120 miles by 36%
36% of 120: 0.36 × 120 =
43.2
Add: 120 + 43.2 =
163.2 miles
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7) Decrease 82 ounces by 15%
15% of 82: 0.15 × 82 =
12.3
Subtract: 82 - 12.3 =
69.7 ounces
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8) Decrease $7000 by 28%
28% of 7000: 0.28 × 7000 =
1960
Subtract: 7000 - 1960 =
$5040
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9) Increase 120 cm by 32%
32% of 120: 0.32 × 120 =
38.4
Add: 120 + 38.4 =
158.4 cm
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10) Decrease 180 lb by 14%
14% of 180: 0.14 × 180 =
25.2
Subtract: 180 - 25.2 =
154.8 lb
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11) Increase 130 seconds by 22%
22% of 130: 0.22 × 130 =
28.6
Add: 130 + 28.6 =
158.6 seconds
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12) Decrease 320 minutes by 65%
65% of 320: 0.65 × 320 =
208
Subtract: 320 - 208 =
112 minutes
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13) Increase 76 miles by 86%
86% of 76: 0.86 × 76 =
65.36
Add: 76 + 65.36 =
141.36 miles
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14) Decrease $12,000 by 72%
72% of 12000: 0.72 × 12000 =
8640
Subtract: 12000 - 8640 =
$3360
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15) Increase $9,000 by 43%
43% of 9000: 0.43 × 9000 =
3870
Add: 9000 + 3870 =
$12,870
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Final Answer:
1) $2025
2) $714
3) 1394 yards
4) 39 inches
5) 80.64 gallons
6) 163.2 miles
7) 69.7 ounces
8) $5040
9) 158.4 cm
10) 154.8 lb
11) 158.6 seconds
12) 112 minutes
13) 141.36 miles
14) $3360
15) $12,870
Parent Tip: Review the logic above to help your child master the concept of percent increase and decrease worksheet pdf.
