An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2.
I say divided by (the divisor or denominator).
1
divided by
0.05
1
4/12 can be simplified, just see if they both can be divided by a number. (Let's say 2) 4 divided by 2 is 2, and 12 divided by 2 is 6. Therefore we have 2/6. BUT WAIT! We can simplify it further 2 divided by 2 is 1, and 6 divided by two is 3. So we have 1/3. An easier way? 4 is 1/3 of 12.
To reduce is to make it littler. Ex. 2/4 = 1/2 divided by 2.
1.5
256 divided by 2 divided by 2
The second number. Say, if you had 6 divided by 2, then 2 in the divisor and 6 is the dividend.
80