A lamp is plugged into a 110 Volt electrical outlet. There is a 9 Watt LED bulb in the lamp. What is the current in the bulb? What is the resistance of the bulb?

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

one "light year" is the distance that light travels, through vacuum, in one julian year.   that's 365.25 days, of 24 hours each.