Answer:
Divide the numerator by the denominator. Your answer would be the whole number, and the remainder would be your fraction.
I have also clipped a picture from fractionfun.com to make it more clear.
1. The shop told the retailer 3.400
2. The children wrote 6.530 on their whiteboard
24 feet by 15 feet
You divide each nukber by 5 bevause that is the given scale factor.