is 4 fifteenths bigger or is 2 fifths?

Answer 1

Make the lower number the same them compare,

as in 4/15 and 2/5

becomes 4/15 and 6/15

from 2x3/5x3

or 6/15

Answer 6/15 is bigger than 4/15

i.e. 2/5 is bigger.