Finding Percent of Change (A)

Sep 23, 2026

Uploaded by James

Finding Percent of Change (A) is a K-12 math worksheet focused on computing percent change from an original value to a new value. Students determine whether each case represents an increase or a decrease using the formula (New − Original) ÷ Original × 100. The set includes 12 standard problems and one challenge involving a sneaker price increase from $80 to $100, asking for the dollar increase, percent change, and the projected price after an additional 25% rise.

LanguageEnglish

CategoryExam

FormatPDF

Pages2

Reading Time5 min

AccessFree to download

Finding Percent of Change (A)

Practice problems (1-12)

Challenge problem (13)

Name: ______________________________________ Finding Percent of Change (A) Directions: Find the percent of change for each pair. State whether it is an increase or decrease. | Percent of Change
New − Original

Original | × 100 | | --- | --- | | If the answer is positive → percent increase. If the answer is negative → percent decrease. | | 1. Original: 50, New: 60 % Change = 2. Original: 80, New: 100 % Change = 3. Original: 40, New: 44 % Change = 4. Original: 30 , New: 40 % Change = 5. Original: 200, New: 250 % Change = 6. Original: 60, New: 90 % Change = 7. Original: 70, New: 84 % Change = 8. Original: 180 , New: 162 % Change = 9. Original: 90, New: 126 % Change = 10. Original: 120, New: 144 % Change = 11. Original: 35 , New: 21 % Change = 12. Original: 100, New: 115 % Change = 13. Challenge Problem A store sold sneakers for $80 last year. This year the price increased to $100. a) What is the amount of the price increase? b) What is the percent of change? c) If the price increases by another 25% next year, what will the new price be? Mashup Math LLC | Al[l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com) ANSWER KEY 1.) (50→60) → (60−50)÷50×100 = 20% increase 2.) (80→100) → (100−80)÷80×100 = 25% increase 3.) (40→44) → (44−40)÷40×100 = 10% increase 4.) (40→30) → (30−40)÷40×100 = 25% decrease 5.) (200→250) → (250−200)÷200×100 = 25% increase 6.) (60→90) → (90−60)÷60×100 = 50% increase 7.) (70→84) → (84−70)÷70×100 = 20% increase 8.) (180→162) → (162−180)÷180×100 = 10% decrease 9.) (90→126) → (126−90)÷90×100 = 40% increase 10.) (120→144) → (144−120)÷120×100 = 20% increase 11.) (35→21) → (21−35)÷35×100 = 40% decrease 12.) (100→115) → (115−100)÷100×100 = 15% increase 13.) Challenge Problem: a) $20 ($100 − $80 = $20) b) 25%($20 ÷ $80 = 0.25 = 25% increase) c) $125 ($100 × 1.25 = $125) Mashup Math LLC | Al[l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com](l Rights Reserved | Get More K-12 Math Worksheets at www.mashupmath.com)

FAQs

What formula is used to find the percent of change?

Use (New − Original) ÷ Original × 100.

How do you tell if the percent of change is an increase or a decrease?

If the percent change is positive, it is an increase. If it is negative, it is a decrease.

In the challenge problem, how do you find the new price after another 25% increase?

Compute the price after a 25% rise: $100 × 1.25 = $125.

Sep 23, 2026

Uploaded by James