Answer:
the 3rd one! :))
Step-by-step explanation:
We know that ratios can be shown with both fractions and colons.
20:705
or

It also looks like we can simplify this by dividing by 5.
20/5 = 4
705/5 = 141.
This means that for every 4 teachers, there are 141 students.
The ratio for teachers to students is:
4 : 141
The numbers that can be expressed in the form of a fraction are called rational numbers. While that numbers that cannot be expressed in the form of a fraction are called irrational numbers.


is an irrational number, it cannot be expressed in the form of a fraction.
Answer:
You are incorrect the answer is 3 1/4