Question

What is the Value of X/Y when X = 9/4 and Y =3/5?
A.15/4
B.4/3
C.27/20
D.- 15/4

Answer 1

c.

Answer 2

@Clalgee

Answer 3

@MathDummy-123

Answer 4

@kropot72

Answer 5

@mathstudent55

Answer 6

@zepdrix

Answer 7

@iPwnBunnies

Answer 8

\[\Large\rm \color{orangered}{X=\frac{9}{4}},\qquad\qquad \color{royalblue}{Y=\frac{3}{5}}\]

\[\Large\rm \frac{\color{orangered}{X}}{\color{royalblue}{Y}}\quad=\quad \frac{\color{orangered}{9/4}}{\color{royalblue}{3/5}}\]Remember what to do when you `divide` by a fraction?

Answer 9

You flip the bottom fraction, and rewrite the operation as multiplication.
Sound familiar?

Answer 10

\[\Large\rm \frac{9}{4}\cdot\frac{5}{3}\]Then just multiply across, yes?
Understand?

Answer 11

OK I'm correct C. Its 9x3 4x5

Answer 12

No no no no no no no.
I see this mistake so often.

Answer 13

You only cross multiply if there is an `equals sign`.
Normal multiplication is just top multiply top, bottom multiply bottom.

Answer 14

\[\Large\rm \frac{9}{4}=\frac{5}{3}\qquad\to\qquad 9\cdot3=4\cdot5\]\[\Large\rm \frac{9}{4}\cdot\frac{5}{3}=\frac{9\cdot5}{4\cdot3}\]

Answer 15

Ok still dont get the answer

Answer 16

Because you have to simplify.

Answer 17

\(\bf \cfrac{x}{y}\qquad x=\frac{9}{4}\qquad y=\frac{3}{5}
\\ \quad \\
\cfrac{x}{y}\implies \cfrac{\frac{9}{4}}{\frac{3}{{\color{brown}{ 5}}}}\implies \cfrac{9}{4}\cdot \cfrac{{\color{brown}{ 5}}}{3}\implies \cfrac{\cancel{ 9 }\cdot 5}{4\cdot \cancel{ 3 }}\implies ?\)