Determine which of the values could be used to clear fractions in the given equation 1/4*-2/5=1/2*+2

The value that can turn the fractions into whole numbers is the common denominator ... the common denominator of 4,5,2, and 1 is 20.

so we would multiply the entire equation by 20

1/4x - 2/5 = 1/2x + 2 ... multiply everything by 20

5x - 8 = 10x + 40 ... poof ... bye-bye fractions