Express the following two measurements as a ratio.

(a) A centimeter to a meter. :

(b) A meter to a kilometer. :

(c) A gram to a kilogram. :

(a) A meter has 100 centimeters, so the ratio of centimeter to a meter is 1:100

(b) A kilometer has 1000 meters, so the ratio of a meter to a kilometer is 1:1000

(c) A kilogram has 1000 grams, so the ratio of a gram to a kilogram is 1:1000