Fractions & Ratios Challenge

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Fun fractions, ratios, and proportions.

Osmar Villa

United States

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Fractions & Ratios Challenge


Fractions & Ratios ChallengeVersion en ligne Fun fractions, ratios, and proportions. par Osmar Villa 1 What is 3/4 of 20? a 18 b 12 c 10 d 15 2 If A:B = 2:3 and A = 4, what is B? a 9 b 3 c 5 d 6 3 5 is to 20 as x is to 100. What is x? a 5 b 25 c 40 d 20 4 Compute: 1/3 + 1/6 = ? a 1/2 b 1/3 c 2/9 d 5/6 5 Multiply: (2/5) × (3/4) = ? a 4/5 b 2/5 c 1/5 d 3/10 6 If A:B = 4:5 and A = 8, what is B? a 8 b 9 c 12 d 10 7 Which fraction equals 25%? a 1/4 b 3/10 c 2/5 d 1/5 8 If 6 candies cost $0.60, how much for 15 candies? a $2.00 b $1.00 c $0.50 d $1.50 9 Half of 3/8 is ? a 3/16 b 3/4 c 6/16 d 1/8 10 7 is to 14 as x is to 28. What is x? a 28 b 14 c 56 d 7 Feedback 1 3/4 of 20 means 0.75 × 20 = 15; the others aren’t 75% of 20. 2 B scales with A; 4 corresponds to 2 parts, so 3 parts give 6. 3 4 times as much is 5×4 = 20; x must keep the same ratio with 100. 4 Common denom 6: 2/6 + 1/6 = 3/6 = 1/2. 5 Multiply numerators and denominators: 6/20 = 3/10. 6 Scale factor is 2; 5 × 2 = 10. 7 25% = 25/100 = 1/4; others are different percentages. 8 Unit price is $0.10; 15 × 0.10 = $1.50. 9 Half of 3/8 is (1/2)×(3/8) = 3/16. 10 7:14 = 1:2; x should pair with 28 as 1:2, so x = 14.