Standard Mathematics Primary 3 Fractions

Priya shaded 3/5 of a paper strip during her Art lesson. Her teacher asked her to express this as an equivalent fraction with 15 as the denominator. Which of the following is correct? 3/5 = ___/15

A 9/15
B 6/15
C 12/15
D 3/15
Show Worked Solution

Worked Solution

Step 1: Find what number to multiply the denominator by to get 15. 5 × ? = 15 5 × 3 = 15, so the scale factor is 3. Step 2: Multiply both the numerator and denominator by 3. 3/5 = (3 × 3)/(5 × 3) = 9/15 So 3/5 = 9/15.

Correct answer: 9/15

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