Express the following scale as a ratio in the form $1:\editable{}$1:.

1 cm represents $240$240 cm.

$1:\editable{}$1:

Express the following scale as a ratio in the form $1:x$1:x.

1 cm represents $2$2 km.

Convert the following description to a proper scale ratio:

$3$3 cm represents an actual distance of $9$9 m.

Bianca is looking over a map of her local area and notices that the scale of the map is given as $1:100$1:100 in the map legend.