Question

For a technological company what are the key ratios we should look to know that the company is worth investing.

Answer 1

just look how much it invest in the R&D(research and development).

Answer 2

Lets compare Indian companies and US companies... as Indian companies generally behave frugally, their investment % will be much less then the RND investment of the US company. Hence how far can we draw a conclusion that a company is doing good just by looking at their RnD expenses%.