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Proportion of one thing to another?
Ratio
What are some modern examples of math that seem to use the same ideas as the ancient greek math?
Pythagorean Theorem would be the first thing to come to mind. Well, this is kind of more related to art/architecture, but there is the golden rectangle and the golden ratio. The golden ratio is represented by the Greek letter phi, which appears as a circle with a slash going through it. It is a value representing the ratio of the lesser to the greater when the ratio of the lesser to the greater is the same as the ratio of the greater to the whole. In Ancient Greek, architects used this technique to create beautiful buildings and works of art, where the ratio of the length to the width of the rectangle in one of the structures (or vice versa) is equal to the golden ratio.
What do a proportion look like?
it can be in lots of ways. I'll show U 2 ways First it looks like X:Y=A:B (A,B,X,Y are real numbers) that means the ratio of X to Y is eaqual to the ratio A to B Second X/Y=A/B (means same thing)
Can proportion be nagative value?
No. A proportion is the relationship of one part of something to the whole thing. If X is a fifth of Y, this must be a positive value.
Is a ratio the same as division?
No. A ratio is calculated using division but they are not the same thing.
