A box contains some blue, red and green sweets. The ratio of the number of blue sweets to the number of red sweets is 7 : 9. The ratio of the number of red sweets to the number of green sweets is also 7 : 9. What is the ratio of the number of blue sweets to the number of green sweets in the box?
Blue |
Red |
Green |
7x7 |
9x7 |
|
|
7x9 |
9x9 |
49 u |
63 u |
81 u |
The number of red sweets is the repeated identity.
LCM of 7 and 9 = 63
Blue sweets : Green sweets
49 : 81
Answer(s): 49 : 81