AC Lim's answer to yummy's Secondary 1 Maths Singapore question.

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AC Lim
Ac Lim's answer
13086 answers (A Helpful Person)
$20×6.5% = $1.30

Therefore, discounted price
$20-$1.30 = $18.70 per book

So, 200 books = $18.70 × 200 = $3740


Or
$20 × 200 = $4000.
$4000 × 6.5% = $260
$4000 - $260 = $3740.

Or
$4000 × 93.5% = $3740

Hope this helps