You use beads to make a decision. Of the beads,1/3 are red and 1/4 are blue. The rest are white. What fraction of the beads are red or blue.

Answer :

7/12 of the beads are red or blue. To find this answer, you must find a common denominator and rewrite the equation as 12ths.

4/12= 1/3
3/12=1/4