← Back to the Percent Change worksheet
Last updated: October 22, 2026 · Written by the Math Made Easy math teachers
Standards: 7.RP.A.3 · Level: Grade 7
Problem 1 Movie Ticket Increase
Change: 15.60 − 12.00 = 3.60.
3.60 ÷ 12 = 0.30 = 30%.
Answer: 30% increase
Problem 2 Score Decrease
Change: 250 − 200 = 50.
50 ÷ 250 = 0.20 = 20%.
Answer: 20% decrease
Problem 3 Class Growth
Increase: 0.15 × 40 = 6.
New enrollment: 40 + 6 = 46.
Answer: 46 students
Problem 4 Bike Price Reduction
Reduction: 0.125 × 320 = 40.
New price: 320 − 40 = 280.
Answer: $280
Problem 5 Measuring a Board
Error: |48 − 50| = 2 cm.
2 ÷ 50 = 0.04 = 4%.
Answer: 4% error
Problem 6 Town Population
Change: 300.
300 ÷ 6,000 = 0.05 = 5%.
Answer: 5% increase
Problem 7 Pay Before the Raise
New pay = 120% of old pay: 1.20 × old = 540.
Old pay: 540 ÷ 1.20 = 450.
Answer: $450
Problem 8 Jacket Before the Sale
Sale price = 70% of original: 0.70 × original = 84.
Original: 84 ÷ 0.70 = 120.
Answer: $120
Problem 9 Percent Error on a Number Line
Error: 12.5 − 12.1 = 0.4.
0.4 ÷ 12.5 = 0.032 = 3.2%.
Answer: 3.2% error
Problem 10 Down Then Up
After the fall: 80 × 0.75 = 60.
After the rise: 60 × 1.25 = 75.
Overall change: 75 − 80 = −5, and 5 ÷ 80 = 0.0625 = 6.25%.
Answer: $75; 6.25% decrease overall
Problem 11 Which Plant Grew More
A: 3 ÷ 8 = 0.375 = 37.5%. B: 6 ÷ 20 = 0.30 = 30%.
B grew 6 inches and A grew 3 inches.
Answer: Plant A has the greater percent growth (37.5% versus 30%); Plant B grew more inches
Problem 12 Monthly Sales Changes
Jan to Feb: 250 ÷ 1,250 = 20% increase.
Feb to Mar: −150 ÷ 1,500 = 10% decrease.
Jan to Mar: 100 ÷ 1,250 = 8% increase.
Answer: +20%, −10%, +8%
Problem 13 Recipe with Fractions
Change: 1 − 34 = 14.
14 ÷ 34 = 13 = 33 13%.
Answer: 33 13% increase
Problem 14 Attendance Estimate
Error: 2,025 − 1,800 = 225.
225 ÷ 2,025 ≈ 0.1111 = 11.1%.
Answer: about 11.1% error
Problem 15 Population Over Two Years
Year 1: 25,000 × 1.12 = 28,000.
Year 2: 28,000 × 0.95 = 26,600.
Overall: 26,600 − 25,000 = 1,600, and 1,600 ÷ 25,000 = 6.4%.
Answer: 26,600 residents; 6.4% increase overall
Problem 16 Sofa Price Round Trip
Original: 690 ÷ 1.15 = 600.
Discounted: 690 × 0.85 = 586.50.
Change: 586.50 − 600 = −13.50, and 13.50 ÷ 600 = 0.0225 = 2.25%.
Answer: $600; $586.50; 2.25% decrease
Problem 17 Lab Scale Tolerance
(a) Error: 252 − 245 = 7, and 7 ÷ 245 ≈ 0.0286 = 2.9%.
(b) 2.9% is less than 3%, so yes.
(c) 3% of 245 = 7.35, so the largest acceptable reading is 252.35. Since 253 > 252.35, no.
Answer: 2.9%; yes; no
Problem 18 Video Views Growth
Change: 6,250, and 6,250 ÷ 12,500 = 50%.
Month 3: 18,750 × 1.50 = 28,125.
Answer: 50% increase; 28,125 views
Problem 19 Two Price Cuts Compared
A: 18 ÷ 80 = 22.5%. B: 24 ÷ 120 = 20%.
The dollar cuts are $18 and $24.
Answer: Store A has the greater percent decrease; Store B has the larger dollar cut
Problem 20 Skis After Two Discounts
Multiplier: 0.65 × 0.80 = 0.52.
Original: 91 ÷ 0.52 = 175.
Total discount: 1 − 0.52 = 0.48 = 48%.
Answer: $175; 48% total discount