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This problem trains for: SAT-I, GMAT, Math Kangaroo 5-6, Math Kangaroo 7-8.

If x is 63% of y and z is 87% of x, approximately how much percent of z is y?

The problem states that:

Solving for x in the first equality:

Solving for y in the second equality:

Eliminate x between the two to get a relation between y and z:

Find the unknown percentage p: