CCSS.MATH.7.RP.A.2 / TEKS 7.4.A.2✓ New York State Education Department (NYSED) AlignedAcademic Year 2026–27
Percentages as Rates per Hundred
Convert fluently between decimals, fractions, and percentages, and calculate sales tax, discounts, and tips.
Why It Matters:Fundamental for consumer budgeting, interest rates, retail discounts, and tax computations.
Curated Video Instruction
● Verified Active EmbedSTEP-BY-STEP PROOF
Worked Example
Calculate 15% tip on a $60 restaurant bill:
1
Convert percent to decimal
15% = 15/100 = 0.15
Percent means per hundred.
2
Multiply bill by decimal rate
60 * 0.15 = 9.00
The tip is $9.00.
3
Calculate total bill
60 + 9 = $69.00
Total bill with tip is $69.00.
✓Verification Check
Verify mental math: 10% of 60 is 6; 5% is 3; 6 + 3 = 9.
6 + 3 = 9
•
9 = 9
⚠️ Common Pitfalls & Misconceptions
Multiplying by the whole percent number without converting to decimal
✗ Calculating 60 * 15 = $900 tip✓ Always convert percent to decimal (15% = 0.15) or divide by 100 first
15% is a fraction (15/100), not a multiplier of 15.
INTERACTIVE DRILLS
Guided Practice
Practice Question1 of 1
Step-by-step Feedback
What is 20% of 80?
MASTERY BENCHMARK
Official Assessment Quiz
Formal Assessment
Percentages as Rates per Hundred
Passing Criteria:70% or higher
Question 1 of 1
What is 1/4 expressed as a percentage?
Education to Career Navigation
Where This Lesson Leads
Accountants, Retail Buyers, and Real Estate Agents calculate percentages constantly.