Given:
8.5 ounces of mustard
about 1/25 of the mustard on each hot dog
Required:
Number of mustards left after he eats 7 hot dogs
Solution:
(1/25)(8.5 ounces)(7 hot dogs) = 2.38 ounces
8.5 ounces - 2.38 ounces = 6.12 ounces
There are 6.12 ounces of mustard left.