-1/3x < 48
Divide each side by -1/3. When you divide by a negative the sign flips...
x > 48 ÷ -1/3
divide fractions by multiplying the reciprocal of the divisor
x > 48 × -3
x > -144
It would be converted to 74%
Note that

, where

is the area,

is the length, and

is the width. Substituting our values in, we have:

Multiplying by

gives:

So the width is

miles.
If 3/10 cup is 2/5 full, then the bowl holds:
(3/10) / (2/5)
(3/10)/(2/5) = 3/10 * 5/2 = 15/20 = 3/4
The bowl holds 3/4 of a cup