Lei Jianing's answer to Val's Primary 6 Maths Fractions Singapore question.

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Lei Jianing
Lei Jianing's answer
15 answers (Tutor Details)
Hope this helps :) method 1 is only if you can see that multiplying the ratio by 5 will result in a ratio that is suitable for the fractions 1/5 and 2/3. You can try method 2 via algebra which will always work.