5/6, 7/9, 3/5 make all have a common denominator of the LCM, 90 in this case:
(5/6)(15/15), (7/9)(10/10), (3/5)(18/18)
75/90, 70/90, 54/90
So now it should be clear which fraction are greater than others...
3/5, 7/9, 5/6 (from least to greatest)
Tina should buy 6 packs of aa batteries and 2 packs of d batteries. the cost of each is given as.
6 packs of aa batteries = 6x3 = $18
2 packs of d batteries = 2x4 = $8
total cost = 18 +8 = $26
and aa batteries pack are 3 times greater than d batteries.