is this correct?
5/18 and 25/90 = a proportion?
5/18 = 25/90
Cross multiply.
18 * 25 = 5 * 90
450 = 450
Yep!
To determine if the fractions 5/18 and 25/90 are in proportion, we need to check if their cross products are equal.
The cross product of the fractions 5/18 and 25/90 is calculated as follows:
5/18 * 90/25
To simplify this calculation, we can reduce both fractions first:
5/18 simplifies to 5/18
90/25 simplifies to 18/5
Now, we can multiply the numerators and denominators:
5 * 18 / 18 * 5 = 90/90
As we can see, the cross products are equal (90/90). Therefore, the fractions 5/18 and 25/90 are in proportion.