Perhaps a simple example will illustrate it ..
In A2 down are the source numbers, eg: 100, 200, etc
In B2 down are the percentage increases for each source number,
eg: 10%, 15%, ... (note that these are entered with the "%" sign)
You could put in C2: =A2*(1+B2)
and copy C2 down to return the required results
Any good? hit the YES below