7th Grade Math Practice Test

The idea is to add fractions with different denominators by using a common denominator. The least common multiple of 4 and 6 is 12, so convert each fraction to twelfths: 3/4 becomes 9/12 and 1/6 becomes 2/12. Then add the numerators: 9/12 + 2/12 = 11/12. This is already in simplest form since 11 and 12 have no common factors other than 1. For a quick check, 3/4 is 0.75 and 1/6 is about 0.1667, and their sum is about 0.9167, which matches 11/12.