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primary 5 | Maths | Percentage
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Arianna
Arianna

primary 5 chevron_right Maths chevron_right Percentage chevron_right Singapore

I'm not sure if (a) is correct, if it's not correct me please! And I don't understand (b) Please help! Thank you!

Date Posted: 2 years ago
Views: 288
sstrike
Sstrike
2 years ago
(a)
1s+1b = $98
1s-1b = $34
1s = ($98+$34)÷2 = $66 (Ans)

(b)
1b = $66 - $34 = $32
1-20% = 80% = 0.8
$32÷0.8 = $40
$40-$32 = $8

$30-$8 = $22 (Ans)

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sstrike
Sstrike's answer
5369 answers (A Helpful Person)
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HiderApplecross
Hiderapplecross's answer
1783 answers (Tutor Details)
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