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A racecar driver has completed 12 1/2 laps of a 50 lap race. What fractional part of the race remains?
- a)1/4
- b)1/5
- c)3/4
- d)4/5
- e)75/2
Correct answer is option 'C'. Can you explain this answer?
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A racecar driver has completed 12 1/2 laps of a 50 lap race. What frac...
The driver has 50 - 12 1/2 or 37 1/2 laps to go out of the . Therefore, (37 1/2)/50 is the fractional part of the race remaining. This is equivalent to 3/4, which is answer C.
a. (1/4) This is the fraction of the race that the driver has completed.
b. (1/5) This comes from mistakenly dividing by , the latter number coming from adding both lap amounts. The race is only .
c. Correct
d. (4/5) This comes from taking the fraction in response B and subtracting it from 1.
e. (75/2) This comes from , but that’s how many laps are left - the driver is only in one race, not !
a. (1/4) This is the fraction of the race that the driver has completed.
b. (1/5) This comes from mistakenly dividing by , the latter number coming from adding both lap amounts. The race is only .
c. Correct
d. (4/5) This comes from taking the fraction in response B and subtracting it from 1.
e. (75/2) This comes from , but that’s how many laps are left - the driver is only in one race, not !
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A racecar driver has completed 12 1/2 laps of a 50 lap race. What frac...
Fraction of the race completed
To find out what fractional part of the race remains, we first need to figure out what fractional part of the race has already been completed. The racecar driver has completed 12 1/2 laps out of a total of 50 laps. We can convert this mixed number into an improper fraction and add it to 50 to find the total number of laps in the race:
- 12 1/2 = 25/2 (convert to improper fraction)
- Total laps = 50
- Laps completed = 25/2
- Fraction of race completed = laps completed / total laps
- Fraction of race completed = (25/2) / 50
- Fraction of race completed = 25 / 100
- Fraction of race completed = 1/4
Fraction of the race remaining
Now that we know that 1/4 of the race has been completed, we can subtract this from 1 to find out what fraction of the race remains:
- Fraction of race remaining = 1 - 1/4
- Fraction of race remaining = 3/4
Therefore, the answer is option C, 3/4 of the race remains.
To find out what fractional part of the race remains, we first need to figure out what fractional part of the race has already been completed. The racecar driver has completed 12 1/2 laps out of a total of 50 laps. We can convert this mixed number into an improper fraction and add it to 50 to find the total number of laps in the race:
- 12 1/2 = 25/2 (convert to improper fraction)
- Total laps = 50
- Laps completed = 25/2
- Fraction of race completed = laps completed / total laps
- Fraction of race completed = (25/2) / 50
- Fraction of race completed = 25 / 100
- Fraction of race completed = 1/4
Fraction of the race remaining
Now that we know that 1/4 of the race has been completed, we can subtract this from 1 to find out what fraction of the race remains:
- Fraction of race remaining = 1 - 1/4
- Fraction of race remaining = 3/4
Therefore, the answer is option C, 3/4 of the race remains.
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A racecar driver has completed 12 1/2 laps of a 50 lap race. What fractional part of the race remains?a)1/4b)1/5c)3/4d)4/5e)75/2Correct answer is option 'C'. Can you explain this answer?
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