Hannah had 4 candy bars. She gave 1/4 of a candy to each of her friends. How many friends received a share?

Answer 1

Units are important here. You have a value of (4 bars), and a ratio of (1/4 bar)/friend, which you can rewrite as (1 friend)/(1/4 bar)=4 friends/bar. Multiply (4 bars)*(4 friends/bar) to get 4*4 bars*friends/bar. The 'bar' in the numerator and denominator cancel, and you're left with the answer: 16 friends.