7. LCD means, Lowest common denominator. so No
8. when the numerator is greater than the denominator it is called an improper fraction.
9. a reciprocal is when you flip a fraction around for example 4/5 reciprocal is 5/4.
10. a proportion is when a part, share, or number considered in comparative relation to a whole. for example: 2 : x = 3 : 9.
11. a variable is a quantity that may change within the context of a mathematical problem or experiment. Typically, we use a single letter to represent a variable. The letters x , y , and z are common generic symbols used for variables.
