PSLEThere are some stickers in albums D and E. 80% of the stickers in album D and 20% of the stickers in album E are oval stickers. There is an equal number of round stickers in both albums. If there are 345 more oval stickers in album D than in album E, how many stickers are there in both albums altogether?
D |
E |
Oval |
Round |
Oval |
Round |
4x4 |
1x4 |
1 |
4 |
16 u |
4 u |
1 u |
4 u |
20% =
20100 =
1580% =
80100 =
45The number of round stickers in both albums is the same. Make the number of round stickers the same. LCM of 1 and 4 is 4.
Number of more oval stickers in Album D than Album E
= 16 u - 1 u
= 15 u
15 u = 345
1 u = 345 ÷ 15 = 23
Number of stickers in both albums
= 16 u + 4 u + 1 u + 4 u
= 25 u
= 25 x 23
= 575
Answer(s): 575