AMC 8 Fractions, Decimals & Percents 1 — Questions and Answers
Question 1: What is 3/4 + 5/6?
- 8/10
- 19/12 (Correct answer)
- 3/2
- 11/12
Correct answer: 19/12
Converting to a common denominator: 9/12 + 10/12 = 19/12.
Question 2: What is 25% of 80?
- 15
- 20 (Correct answer)
- 25
- 30
Correct answer: 20
25% of 80 = 0.25 × 80 = 20.
Question 3: Express 0.625 as a fraction in lowest terms.
- 5/8 (Correct answer)
- 6/9
- 3/5
- 7/11
Correct answer: 5/8
0.625 = 625/1000 = 5/8 after dividing numerator and denominator by 125.
Question 4: A price increases from $40 to $50. What is the percent increase?
- 10%
- 20%
- 25% (Correct answer)
- 30%
Correct answer: 25%
Percent increase = (change / original) × 100% = (10/40) × 100% = 25%.
Question 5: What is 7/8 − 1/3?
- 6/5
- 13/24 (Correct answer)
- 11/24
- 17/24
Correct answer: 13/24
7/8 − 1/3 = 21/24 − 8/24 = 13/24.
Question 6: What is 40% of 40% of 100?
- 8
- 16 (Correct answer)
- 32
- 64
Correct answer: 16
40% of 100 = 40, and 40% of 40 = 16.
AMC 8 Fractions, Decimals & Percents 1
What is 3/4 + 5/6?