Alana bought 3/8 pound of swiss cheese and 1/4 pound of american cheese. which pair of fractions cannot be used to find how many pounds of cheese she bought in all .

The 3 over 8 because 1 over 4 is 25 from 100 but 3 over 8 do not tell how many she bought in all.there is no number multiply by 8 then gives as 100, ? × 8=100 but there is a number multiply by 4 then gives as 100 25 × 4=100 the answer of the question is '3 over 8'

idk

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