sstrike's answer to Nadyne's Primary 6 Maths Fractions Singapore question.
concept
make numerator same
make numerator same
similar
U can try to make denominator same
LCM(4,5) = 20
total at first
S:D = 20u : 20u+60
sold
S(⅗) : D(¾) = 12u : 15u+45
15u+45 - 12u = 126
3u = 81
left S
20u-12u = 8u
= 8×81÷3 = 216 (Ans)
U can try to make denominator same
LCM(4,5) = 20
total at first
S:D = 20u : 20u+60
sold
S(⅗) : D(¾) = 12u : 15u+45
15u+45 - 12u = 126
3u = 81
left S
20u-12u = 8u
= 8×81÷3 = 216 (Ans)
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