https's answer to Jacey Lim's Primary 6 Maths Fractions Singapore question.

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Https's answer
57 answers (A Helpful Person)
Fraction for $8 = 1/7 × 2/5 - 1/3 × 2/9 × 3/5 = 4/315 = 8/630
7/9 × 3/5 × $630 = $294 (Ans)