



 
Hi Tom, $30$ feet is $30 \times 12 = 360$ inches so the pipe rises (falls?) 2 inches in 360 inches and hence the slope is \[\frac{2}{360} = 0.00556\] which as a percentage is 0.556%. I hope this is what you need. Write back if you need more assistance, 



Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 