math
posted by jazz on .
Find the amount in each case.
a) 8% is 56 kg.
can u set up cross multiplication for this?
8/100=x/56

a) 0.08 * 56 = ?
b) Yes. That's a ratio and can be corssmultiplied. 
but why does the question say "8% IS 56"? why wouldn't it say 8% OF 56?

If it's saying "8% is 56" then your task is to find out what 100% is, I guess. So in that case, your ratio works.
If it said "8% of 56" then 56 would be the 100% and you'd need to multiply to find what 8% is. 
oh ok that makes sense. thanks so much u 2 ur amazing!

Oops. I goofed. Sorry. My fingers got ahead of my brain.
I think the problem means that 8% of a number is 56 kg.
0.08 x = 56
x = 56 / 0.08
x = 700 
thats ok everyobdy makes mistakes! :) ok ill try it that way.