<PRE><B>Question 647541</B>
Multiply across.

7*4 = 28

12 *5 = 60

{{{28/60}}} is your raw answer.

Most mathematicians have certain standards. One of those being that a fraction should always be in its simplest form.

What is the GCD(28,60). ~GCD is greatest common divisor.

If you are unsure, just divide by numbers you feel comfortable with.

Well 28 and 60 are both even so I can divide a 2.

But hey 14 and 30 are both even so I can divide a 2 again. (Dividing by 2 two times is equivalent to dividing by 4.)

7 and 15 have a GCD of 1. 

{{{7/15}}} is the simplest answer.</PRE>