Advanced Mathematics Primary 4 Fractions

A fish tank was 7/8 full of water. Ravi used 2/3 of the water in the tank to water his plants. What fraction of the tank is still filled with water?

A 7/24
B 7/12
C 5/24
D 3/8
Show Worked Solution

Worked Solution

Step 1: Find the fraction of the tank used. 2/3 of 7/8 = 2/3 × 7/8 = 14/24 = 7/12 Step 2: Find the fraction remaining. 7/8 - 7/12. LCD of 8 and 12 is 24. 7/8 = 21/24, 7/12 = 14/24 21/24 - 14/24 = 7/24 Step 3: Answer is 7/24.

Correct answer: 7/24

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