Question
The teacher said that the ratio of the number of fish to that of the tortoise is 7:2 in the lab. The number of fishes the lab has if there are 6 tortoises is __________
- 21
- 22
- 23
- 24
Hint:
A ratio indicates how many times one number contains another.
The correct answer is: 21
Here, it is given that in a lab, the ratio of fishes to tortoise is 7:2. Number of tortoise = 6. We have to find the number of fishes.
Let the number of fishes and tortoise be 7x and 2x respectively.
Then, 2x = 6.
=> x = 6/2
=> x = 3.
So, number of fishes = 7x = 7 × 3 = 21.
Ratio is another way of representing decimals, fractions and percentage.
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