Tao Nan School P6 Math CA1 2004 (Q45)

Carol’s salary is 3/8 of Ben’s salary. David’s salary is 5/6 of Carol’s. After Ben gives $70 to David, David has twice as much money as Carol.
a) How much does David have now?
b) What is the new ratio of David’s salary to Carol’s salary to Ben’s salary? (Express your answer in the simplest form)

Solution



7 units ----- $70
1 unit ----- $70 divided by 7 = $10

Q(a) David now has

12 units ----- $10 x 12 = $120

Answer: David has $120.


Q(b)



Answer: The new ratio of David’s salary to Carol’s salary to Ben’s salary is 4 : 2 : 3