# Sarin’s family in Kluang part 4 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings on Solving Singapore Primary School Mathematics. You or your kids can learn dealing with Math modeling, Problem Sum from Lower Primary School to Upper Primary School level in Singapore school. This posting is a primary school math question on Percentage.

Read also the posting on Sarin learns Average Number, Percentage and Charting in school (Math Concept) to understand concept of Percentage.

Upper primary school mathematics question UPQ192

The music store at Popular Bookshop in Kluang Mall gave a 10% discount off the usual price of their CDs in celebration of their tenth anniversary. Sarin paid the cashier \$18 equivalent of Malaysia Riggit after discount. What was the usual price of the CD selling at Popular Bookshop in Kluang Mall? Sarin can get the same item in the music store at Popular Bookshop in Singapore at the price of \$25. What was the amount of saving in percentage as compared to buy the CD in Singapore?

Solution:

The music store gave a 10% discount,

Sarin bought them at 100% – 10% = 90% of the original price

90% è \$18

10% è \$2

100% è \$20

The usual price of the CD selling at Popular Bookshop in Kulang is \$20

The price of the CD selling at popular Bookshop in Singapore = \$25

The amount of saving = 25 – 18 = \$7

The percentage of saving as compared to buy it in Singapore = 7/25 × 100% = 28%