What is the scale factor?

Answer:
3/5
Step-by-step explanation:
The fraction consists of two numbers and a fraction bar: 15/9
The number above the bar is called numerator: 15
The number below the bar is called denominator: 9
The fraction bar means that the two numbers are dividing themselves.
To get fraction's value divide the numerator by the denominator:
Value = 15 ÷ 9