Two children are balanced on opposite sides of a seesaw. if one child leans inward toward the pivot point, her side will

measure their densities same density, same sub

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form