To find the ratio between 2 numbers, you need to find the GCF of those 2 numbers. If the GCF is the ratio, the ratio is in it's simplest form.
GCF of 90 and 18 is 18
divide both numbers by the GCF and the final simplest ratio is 5:1
The answer is ten if I'm correct
9.35$ Because if you Think in ur brain and you multiply by Benjamin Franklin Then If you do
0.17x 55=9.35$ Cuz Multiply