Respuesta :

Answer:

17:20

Explanation:

the lowest term of this answer is 17 and 20

Divide both Terms by 40

680/40 = 17

800/40 is 20

godaja
Answer:
4:5

First to reduce the ratio 640:800 further with the greatest common factor (GCF).

The greatest common factor of 640 and 800 is 160.

640 / 160 = 4
800 / 160 = 5

Therefore:
640:800 = 4:5

Hope this helped!