Here are the step-by-step solutions for each problem on the worksheet.
1) Savings Account Interest
*
Step 1: Find 3% of $3500. To do this, multiply 3500 by 0.03.
$3500 \times 0.03 = 105$
*
Step 2: Add the interest to the original amount.
$3500 + 105 = 3605$
2) Laptop Sale Price
*
Step 1: Find 15% of $640. Multiply 640 by 0.15.
$640 \times 0.15 = 96$
*
Step 2: Subtract the discount from the original price.
$640 - 96 = 544$
3) Spelling Test Score
*
Step 1: Find 25% of the score 28. Multiply 28 by 0.25.
$28 \times 0.25 = 7$
*
Step 2: Add the improvement to the original score.
$28 + 7 = 35$
4) Cycling Distance
*
Step 1: Find 20% of 160 miles. Multiply 160 by 0.20.
$160 \times 0.20 = 32$
*
Step 2: Subtract that amount from the original distance because he cycled *fewer* miles.
$160 - 32 = 128$
5) Plane Altitude
*
Step 1: Find 40% of 25,000 ft. Multiply 25,000 by 0.40.
$25,000 \times 0.40 = 10,000$
*
Step 2: Add the climb to the starting altitude.
$25,000 + 10,000 = 35,000$
6) Rainfall Amount
*
Step 1: Find 40% of 2.5 inches. Multiply 2.5 by 0.40.
$2.5 \times 0.40 = 1$
*
Step 2: Add the extra rainfall to the driest month's amount.
$2.5 + 1 = 3.5$
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 percent increase and decrease word problems worksheet with answers.
