Problem: In the expression xy2, the values of x and y are each decreased 25%, the value of the expression is
Answer Choices:
A. decreased 50%
B. decreased 75%
C. decreased 37/64 of its value
D. decreased 27/64 of its value
E. none of these
Solution:
43x⋅(43y)2=6427xy2, and the decrease is xy2−6427xy2=6437xy2.