PSLEThere are some stickers in albums Y and Z. 80% of the stickers in album Y and 20% of the stickers in album Z are oval stickers. There is an equal number of square stickers in both albums. If there are 270 more oval stickers in album Y than in album Z, how many stickers are there in both albums altogether?
Y |
Z |
Oval |
Square |
Oval |
Square |
4x4 |
1x4 |
1 |
4 |
16 u |
4 u |
1 u |
4 u |
20% =
20100 =
1580% =
80100 =
45The number of square stickers in both albums is the same. Make the number of square stickers the same. LCM of 1 and 4 is 4.
Number of more oval stickers in Album Y than Album Z
= 16 u - 1 u
= 15 u
15 u = 270
1 u = 270 ÷ 15 = 18
Number of stickers in both albums
= 16 u + 4 u + 1 u + 4 u
= 25 u
= 25 x 18
= 450
Answer(s): 450