Oscar has 40% more stamps than Owen. Cody has 80% the number of stamps Oscar has.
- What is the ratio of the number of Owen's stamps to the number of Cody's stamps?
- If the total number of stamps of Oscar's and Cody's is 304 more than Owen's, how many stamps does Oscar have?
Oscar |
Owen |
Cody |
7x5 |
5x5 |
|
5x7 |
|
4x7 |
35 u |
25 u |
28 u |
100% + 40% = 140%
140% =
140100 =
75 Oscar's stamps : Owen's stamps = 35 : 25
80% =
80100 =
45 Cody's stamps : Oscar's stamps = 28 : 35
Owen's stamps: Cody's stamps = 25 : 28 (a)
Oscar's stamps + Cody's stamps = 35 u + 28 u = 63 u
Owen's stamps = 25 u
63 u - 25 u = 304
38 u = 304
1 u = 304 ÷ 38 = 8
Number of Oscar's stamps
= 35 u
= 35 x 8
= 280 (b)
Answers: (a) 25 : 28; (b) 280