Marcos is cutting ribbons for a craft project. Each ribbon needs to be 3/4 yard long. If each piece is always within plus or minus 1/16 yard, how long are the shortest and longest pieces of ribbon?

Answer 1

Shortest would be 3/4 - 1/16

Longest would be 3/4 + 1/16

In order to add or subtract, need a common denominator and create an equivalent fraction. CD is 16, as it's divisible by both 16 and 4. Can you convert 3/4 = ?/16 ? Then you can add or subtract the numerators as required.