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You can click here and read the posting on A family in Singapore about Sarin’s family.
Read also the posting on Sarin learns the concept of Fraction (mathematics concept) to understand the concept of Fraction.
Challenge yourself with the question before look for the given solution‼!
Upper primary school mathematics question UPQ320
Fatimah’s age is 2/7 of her father’s. Her father will be 47 years old in 5 year’s time. In how many years’ time will Fatimah’s age be 5/11 of her father’s?
Fatimah’s age is 2/7 fraction of her father this year
Her father this year = 47 – 5 = 42 years old
Per the model
7 units = 42
1 unit = 6 years old
Fatimah this year = 2 × 6 = 12 years old
The fraction of Fatimah’s age to her father’s age is 5/11 after some years
Or, rearrange the model
Per the model
6 units = 42 – 12 = 30
1 unit = 5 years
5 units = 25
After 25 – 12 = 13 years, Fatimah’s age is 5/11 farction of her father’s age