N a home town if the ratio of cars to people is 420 to 1000, wich shows this ratio as a fraction?

Ratios to fractions can be thought of in terms of one number over a number. 420/1000 is how this is written as a fraction. However, you should look to divide both the top number and the bottom number by one number to get the lowest common denominator. In this case, you can divide each of the numbers by 20. If you take 420/20, you would get 21. If you take 1000/20, you would get 50. Therefore your fraction should be 21/50. This says that there are 21 cars for every 50 people...just a little over 2/5ths. I hope that this helps.