PSLEThere are some stickers in albums T and U. 75% of the stickers in album T and 25% of the stickers in album U are round stickers. There is an equal number of oval stickers in both albums. If there are 72 more round stickers in album T than in album U, how many stickers are there in both albums altogether?
T |
U |
Round |
Oval |
Round |
Oval |
3x3 |
1x3 |
1 |
3 |
9 u |
3 u |
1 u |
3 u |
25% =
25100 =
1475% =
75100 =
34The number of oval stickers in both albums is the same. Make the number of oval stickers the same. LCM of 1 and 3 is 3.
Number of more round stickers in Album T than Album U
= 9 u - 1 u
= 8 u
8 u = 72
1 u = 72 ÷ 8 = 9
Number of stickers in both albums
= 9 u + 3 u + 1 u + 3 u
= 16 u
= 16 x 9
= 144
Answer(s): 144