
Jeremy D. answered 05/03/19
2 Masters Degrees, College Professor, Tutoring 5+ years
We want a ratio, in whole numbers, and simplified.
$100 to $0.80 The easiest way to make this into whole numbers is to multiply both numbers by 10.
$1000 to $8 Now, we can simplify these numbers down by dividing each by 8.
$125 to $1
This can be written in other ways to better show it as a ratio: 125:1 or 125/1
If we have a our calculator handy, there is also a quicker way to arrive at this answer. We could simply divide $100 by $0.80. Here we get a whole number: 125. When written as a fraction, it is 125:1.