Answer:
0.4
Step-by-step explanation:
4 juniors out of a total of 10
4/10 = 0.4
Step-by-step explanation:
3 1/6 = 19/6
That is = 19/6 - 1/4
Take LCM = (38 - 3)/12
= 35/12 that's it I think is this what you wanted?
I would say the amount used would be at least 50 gallons because it makes most sense. Hope I helped :))