A month ago, Kerry weighed 123 1/4 pounds. Now he weighs 120 1/2 pounds. How many pounds did he lose?

For this case we have to:Initial weight = [tex]123 \frac {1} {4} = \frac {4 * 123 + 1} {4} = \frac {493} {4} = 123.25 \ pounds[/tex]Final weight =[tex]120 \frac {1} {2} = \frac {2 * 120 + 1} {2} = \frac {241} {2} = 120.5 \ pounds[/tex]We subtract to know how many pounds he lost:[tex]123.25-120.5 = 2.75[/tex]So, Kerry lost 2.75 pounds.ANswer:Kerry lost [tex]2 \frac {3} {4}[/tex] pounds.