Q: Solve for k:
k / 9 1/8(mixed number) = 20/73
A: So we have 9 and 1/8 as a mixed number… Kind of hard to write clearly on this blog, but basically:
k / “9 and 1/8” = 20 / 73
I don’t like mixed numbers and neither should you. We will get rid of them at all costs…
9 and 1 / 8 = 72/8 and 1/8 = 73/8
So, now we have
k / (73/8) = 20/73
Now, we also know that dividing by a fraction is the same as multiplying by its reciprocal:
(k/1) / (73/8) = 20/73
(k/1) * (8/73) = 20/73
Simplified:
(8/73)*k = 20/73
Now, I want to get k by itself… So, to cancel that 8/73, I will multiply everything by 73/8:
(73/8) * (8 / 73) * k = (73 / 8) * (20/ 73)
Now, cancel things out and reduce:
(73/8) * (8 / 73) * k = (73 / 8) * (20/ 73)
k = 8/20
k = 2/5