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## Question

secondary 4 | E Maths

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##### John Tay

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Why is my 8b part 2 wrong? Pls help tyy

Date Posted: 10 months ago
Views: 77
J
10 months ago
One interpretation :

The 20% of the cash price did not incur any interest. The interest is incurred by that remaining 80% of the original price.

80/100 x \$1170 = \$936

Interest as a percentage of \$936
= \$210.60/\$936 x 100%
= 22.5%

Since it's over 18 months,

Interest per month = 22.5% ÷ 18
= 1.25%

Second interpretation :

Interest was incurred by the entire cash price.

Then, you just need to divide your 18% by 18 months, which gives 1%/month.

### See 1 Answer

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##### Takeuchi Asuka's answer
4 answers (Tutor Details)
1st
Hi! I hope this tallies with the answer key, hope this helps you and jiayou :-)
Date Posted: 10 months ago