Porportions

proportion4/3/09
Think and Discuss
In class I learn about proportion how we can solve it.What help me how to solve the proportion was cross multiply.When my teacher tells me solve the proportion I know that I had to cross multiply I remember this because they teach in the 6 grade so I keep working on it so I remember.Is not that hard ones you know it won't be hard.Then ones I multiply I know that is proportion or not.
2
2/3=x/12;2x=36;x=18
The error was that that they multiply denominator times denominator and is not like that is denominator times numerator so is across.
2/3=x/12
12x2=24
3x=24
X=8

Solve
6/15=2/45
15x6=90
45x2=90
90=90 So it is a proportion.