Sagot :
First you have to put the fractions in the same denominator. 1/5 and 1/2, times the denominators together and get 10. To get 5 to 10 you have to times by 2 so you do the same to the top (2/10) and to get 2 to 10 you times by 5 (5/10). So to start he had 7/10 of olive oil.
1/5 + 1/2. Make sure the under number are same. Become 2/10 + 5/10 = 7/10