Scaling help

Hello, i have a problem. I'm working on a drawing in model space. everythings at 1:1. I have to blow a detail up to 1:20. its currently at 1:1 with everything else. the original drawer, doesnt use viewports. at what scale do i blow the detail up, cause i cant get in wrong. please help.

This should do it...

Command: scale

Specify base point:

Specify scale factor or [Copy/Reference] : 20/1

KC

thanks, couldnt get it

tried it there and its blowing it up X20. i need to scale it 1:20. I know its something easy.

Its scaling to 1/20

20/1=20

1/20=0.05

thanx, struggling to get my head round it. the drawer should be using viewports