Penelope has 2 times as many stickers as Dana. Dana has
37 as many stickers as Risa. If the three of them have a total of 80 stickers, how many stickers does Risa have?
Penelope |
Dana |
Risa |
2x3 |
1x3 |
|
|
3x1 |
7x1 |
6 u |
3 u |
7 u |
The number of stickers that Dana has is repeated. Make the number of stickers that Dana has the same. LCM of 1 and 3 is 3.
Total number of stickers that the three of them have
= 6 u + 3 u + 7 u
= 16 u
16 u = 80
1 u = 80 ÷ 16 = 5
Number of stickers that Risa has
= 7 u
= 7 x 5
= 35
Answer(s): 35