Larry white has been writing these questions in the form:

A =mB and B = nC where m and n are constants

to solve, plug nC into the first equation to get A = mnC

 multiply mn and you will have A is equal to (mn) % of C - manipulate from there

A = .9B   B = 1.2C

A = .9(1.2)C
A = 1.08 C

A is 8% more than C


A = 1.1B  B = .9C
A = 1.1(.9)C
A = .99C

1% less

-- Edited by bradp at 18:12, 2007-03-19