Shawn's answer to rick's Secondary 1 Maths Singapore question.

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Shawn
Shawn's answer
110 answers (A Helpful Person)
1st
2a = 3b
2/1 a = 3/1 b
Since 2/1 of a = 3/1 of b, you can make the numerator the same in order to compare both.
6/3 of a = 6/2 of b, after making them the same numerator, their respective denominator will be their ratio.
So a:b = 3:2

Do the same for the second part.