It is often a ratio.
No. It can be but need not be. For example, you might calculate the ratio of today's temperature in Celsius and in Fahrenheit and calculate the ratio. That is not a rate.
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A fraction or ratio.
The higher the ratio, the faster the rate of diffusion
ratio
You express ratio as a fraction. For instance, the ratio of 3 to 4 is 3/4, or .75
yes because a ratio is a rate so a rate would have to be a ratio
Express the ratio below in its simplest form. 12 : 6
It is often a ratio.
1 : 5 ratio
No. It can be but need not be. For example, you might calculate the ratio of today's temperature in Celsius and in Fahrenheit and calculate the ratio. That is not a rate.
A percent is a ratio, or rate, that compares a number to100
20 Miles per gallon
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A fraction or ratio.
The sign would be :