Standard Mathematics Primary 6 Ratio

In a fish tank, the ratio of red fish to blue fish is 4 : 7. If there are 28 red fish, how many blue fish are there?

A 31
B 49
C 16
D 7
Show Worked Solution

Worked Solution

Step 1: Match the unit value. 4 units of red = 28 fish. Step 2: Find 1 unit. 1 unit = 28 ÷ 4 = 7 fish. Step 3: Find blue fish. Blue = 7 units × 7 = 49 fish. Answer: 49

Correct answer: 49

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