Simple division results in two answers

[brierand]

I think the question is why dividing by a divisor that is 10 times bigger does not result in a quotient 10 times smaller.
It may simply be a typing mistake:
72000 / (10 * 1.5) = 4800 = 48000 / 10
The typing mistake is the use of 1.05 instead of 1.5