The ratio is 7:10 or 3.5:5
I would say C because D has multiplication instead of adding in the parenthesis and I don't think that is the "basic" way
I thinks its 12% but i could be wrong im new so im trying hard
Ok so the amounts are x and 100-x
0.24x+0.5(100-x)=0.36(100)
solve
0.24x+50-0.5x=36
-0.26x+50=36
mminus 36 both sides
-0.26x=-14
divide both sides by -0.26
x=53.8462
find other one
100-x=100-53.8462=46.1538
53.8462 gallons of the 24%
46.1538 gallons of the 50%