[GRASS-user] Slope categories from DEM ?

[Emma]

Hello,

I am new to GRASS and I need to compute, from a DEM, a map showing the  
areas with a slope lower than 30%. So basically I would like 2 slope  
categories, <30% and >30%, but I am quite lost in the way I should do  
it. Could you please sketch me the steps to achieve it?

Thanks a lot for your help!
Emma