Which is greater 1/3, 3/8, 2/5 or 1/2?30

The easiest trick for this one is to find the least common denominator (lcd)

Do were looking for a number that is a multiple of all the denominators.

in this case, it's 120.

then you can divide 120 by the denominators and multiply by their numerators.

showing the first one, 120 / 3x 1=40

the first fraction is 40/120

let's go back to the question with our modified fractions

a. 40/120

b. 45/120

c. 48/120

d. 60/120

we can now tell that 60/120 or 1/2 is the greatest one