56 P5.ST.JC.18160201
Level 3
In a school, there is a total of 400 people.
30% are adults.
The rest are children.
The number of boys and girls is in the ratio of 5 : 9.
  1. What percentage of the people are boys?
  2. How many girls are there?
3 m
Ratio to units Finding percent Percent of a set Percent to units Combined repeated identity Remainder concept Units table Units manipulation
57 P5.ST.JC.18121181
Level 3
Adam has some money.
Adam spends $300 on some stickers and
80% of the remainder on some marbles.
In the end, he has 18 of the total amount left.
  1. How much does Adam have at first?
  2. How much more does Adam spend on marbles than on stickers?
3 m
Fraction of a set Fraction to units Percent to units More than or less than Remainder concept Common numerator Units table Decimal units
58 P5.RD.JM.17083264
Level 3
Evelyn bought 50% more hair clips than Linda. Tammy bought 10% fewer hair clips than Evelyn. Evelyn and Linda gave Tammy some hair clips in the ratio 7 : 2. As a result, Tammy had twice as much hair clips as before. Given that Linda had 15 more hair clips than Evelyn in the end, how much hair clips did Evelyn give to Tammy?
5 m
Ratio to units Percent to units Percent of different bases More than or less than Times as many Repeated identity Internal transfer Units table
59 P5.RD.JM.17083262
Level 3
Mr Lim had three bags of soil, A, B and C and the mass of each bag of soil was in the ratio 2 : 4 : 3. Mr Lim decided to transfer 30% of soil from Bag A into Bag B and 60% of soil from Bag C into Bag B. Given that the mass of Bag B was 38.4 kg in the end, how many kilograms of soil were transferred into Bag B?
5 m
Ratio to units Percent of a whole Percent to units Internal transfer Unchanged total Units table Decimal Units
60 P5.RD.JM.17083210
Level 3
Madam Naz made pies for sale. 45% of the pies were chicken pies and the rest were potato and sardine pies in the ratio 3 : 1. If a customer bought 75% of the chicken pies and all of the sardine pies, what percentage of the potato pies must Madam Naz sell for her to maintain the original percentage of chicken pies at first? Leave your answer in mixed numbers.
5 m
Mixed numbers D Division Ratio to units Percent of a set Percent to units Percent of different bases All change Units table Decimal units

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