Joined: Sep 2009
Posts: 4,697
Likes: 2,039
From: Up
Bikes: Masi, Giant TCR, Eisentraut (retired), Jamis Aurora Elite, Zullo, Cannondale, 84 & 93 Stumpjumpers, Waterford, Tern D8, Bianchi, Gunner Roadie, Serotta, Serotta Duette, was gifted a Diamond Back
adding a chainring is the more expensive approach to changing the gearing.
Explaining the problem with the current gearing will help with answering your questions. Providing the bike manufacturer, year and model will also help.
Also what shifters do are you using?