The numerator is the top half showing how much of something you have. While the denominator is the bottom half which is letting you know the max amount you can have. So 3/4 means you have 3 items and can only have 4. <span />
C; terminating means it stops at a definite point a is a repeating decimal, for b i think you mean radical of 10 and that’s irrational, and d is repeating