Ratio, taught in P5, will appear with many "Before and After" type problem sums.
One of such problem sums presents itself with a known starting ratio between 2 parties.
After one of the party undergoes fractional decrease and the other going through an increase or decrease with a known value, the ending difference is given.
Such questions are common in P5 Paper 2.
Calculator usage is allowed.
Aaron and Kelvin have some sweets in the ratio of 4:5.
After Aaron ate 1/2 of his sweets and Kelvin bought 30 more sweets,
Kelvin now has 63 more sweets than Aaron.
How many sweets did they have altogether at first?
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