Karen bought 4⁄5 pound of broccoli and 2⁄10 pound of cauliflower. how many more pounds of broccoli did she buy?

She bought 3/5 pound more broccoli than cauliflower. Unless this is a trick question

Turn 4/5 into 8/10 by multiplying by 2. This allows the two numbers to have like denominators. Than subtract. This should produce 6/10. Reduce this to 3/5. 3/5 should be the final answer.

(-0, -7) is your answer