PSLEThere are some stickers in albums D and E. 90% of the stickers in album D and 25% of the stickers in album E are round stickers. There is an equal number of square stickers in both albums. If there are 312 more round stickers in album D than in album E, how many stickers are there in both albums altogether?
D |
E |
Round |
Square |
Round |
Square |
9x3 |
1x3 |
1 |
3 |
27 u |
3 u |
1 u |
3 u |
25% =
25100 =
1490% =
90100 =
910The number of square stickers in both albums is the same. Make the number of square stickers the same. LCM of 1 and 3 is 3.
Number of more round stickers in Album D than Album E
= 27 u - 1 u
= 26 u
26 u = 312
1 u = 312 ÷ 26 = 12
Number of stickers in both albums
= 27 u + 3 u + 1 u + 3 u
= 34 u
= 34 x 12
= 408
Answer(s): 408