Which property was used to write the equation in step 2

Manny bought 12 pounds of vegetables at the supermarket. 75% of the vegetables were on sale. how many pounds of vegetables were not on sale? 98 points : )

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.