Roger bought a sandwich with half of his money and a candy bar with one fifth of his money. How much of his money did he spend?

The answer is a fraction of the money he has.

he spent:
1/2 (on candy) and 1/5 (on chocolate) for a total of
1/2+1/5.
To add the fractions, we first find the common denominator, which is the LCM of 2 and 5 =10.
1/2+1/5=5/10+2/10=(5+2)/10 = ?