Sean has 40% more pens than Jeremy. Flynn has 80% the number of pens Sean has.
- What is the ratio of the number of Jeremy's pens to the number of Flynn's pens?
- If the total number of pens of Sean's and Flynn's is 380 more than Jeremy's, how many pens does Sean have?
Sean |
Jeremy |
Flynn |
7x5 |
5x5 |
|
5x7 |
|
4x7 |
35 u |
25 u |
28 u |
100% + 40% = 140%
140% =
140100 =
75 Sean's pens : Jeremy's pens = 35 : 25
80% =
80100 =
45 Flynn's pens : Sean's pens = 28 : 35
Jeremy's pens: Flynn's pens = 25 : 28 (a)
Sean's pens + Flynn's pens = 35 u + 28 u = 63 u
Jeremy's pens = 25 u
63 u - 25 u = 380
38 u = 380
1 u = 380 ÷ 38 = 10
Number of Sean's pens
= 35 u
= 35 x 10
= 350 (b)
Answers: (a) 25 : 28; (b) 350