A ratio always has a common factor, even if it's only 1.
Find a common factor of the number in the ratio. If the common factor is 1, then the ratio cannot be reduced. Otherwise, divide both numbers of the ratio by the common factor. It will have been reduced.
its simplest form.
It is a simplified fraction or ratio.
They are a common factor and any common factor in the numerator and denominator of a ratio can be cancelled out.
Yes.
Dividing the numerator and denominator by a common factor is how you simplify a fraction.
To divide the numerator and the denominator of a ratio by the same factor means to simplify or reduce the ratio. This is done by dividing both numbers in the ratio by their greatest common factor, which results in an equivalent ratio.
Yes.
Yes.
Yes.
Divide both sides of the ratio by any common factor until the only common factor is 3; this can be done in one step by dividing both sides by the highest common factor of the sides. For 21:15 the highest common factor is 3, so divide both sides by 3. Thus: It would simplify to 7:5
if one number is odd 2 cannot be a common factor