How can 10% of 82 be used to determine 60% of 82? Enter your answers in the boxes to correctly complete the statement. 10% of 82 is , so 60% of 82 is .

The perimeter of ? cde is 55 cm. a rhombus dmfn is inscribed in this triangle so that vertices m, f, and n lie on the sides cd , ce , and de respectively. find cd and de if cf=8 cm and ef=12 cm. the answer is not cd=20 and de=15. i have tried that one, it does not work.