PSLE Subjects Tips

Selected materials to help your child with
PSLE Preparation and Revision

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P5 Math Problem Sum: Percentage of Quantity of 2 Items that Changed (Before-After)
Primary 5, Mathematics, PSLE Curriculum Lead, Mathematics Primary 5, Mathematics, PSLE Curriculum Lead, Mathematics

P5 Math Problem Sum: Percentage of Quantity of 2 Items that Changed (Before-After)

Learn the shortcut! By turning the percentage into ratio and using the ratio technique to solve, you now have 1 less thing to learn and it's much easier!

An Example Problem:
In a class, 60% of the students are girls while the rest are boys. After 15 boys left the class, only 10% of the students are boys. What is the total number of students in the class at first?

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