R = x(A + B)...distribute
R = Ax + Bx.....subtract Bx
R - Bx = Ax...divide both sides by x
(R - Bx) / x = A <==
In multiplying fractions, you don't need a common denominator.
3/8 * 6/1 = 18/8
I multiplied the numerator by the other numerator and multiplied the denominator by the other denominator
Now we have to simplify 18/8, the number 2 can go into both numbers
9/4 is the final answer.
Easy not to call it 2 ones and just call it 2 instead.
a tenth is 1 divided by 10 = 0.1.
20 tenths therefore is 20 times 0.1 = 2