Ratio and Proportion Flashcards
1
Q
What is proportion?
A
A proportion is a name we give to a statement that two ratios are equal. It can be written in two ways:
two equal fractions, a/b = c/d
or
using a colon, a:b = c:d
Ratio compares part to part
Proportion compares part to whole
2
Q
When are two ratios equal?
A
when the cross products of the ratios are equal.
That is, for the proportion, a:b = c:d , a x d = b x c
3
Q
How to find an equivalent ratio?
A
To find an equivalent ratio we can divide both parts of a ratio by same number, or we can multiply both parts of same ratio by same number.
4
Q
When is a ratio is in its simplest form?
A
When both numbers in the ratio have no common factors other than 1