This should be trivial but for some reason I cannot think of a formula which enlarges a number in proportion to another number decreasing in the negative direction
Example:
if value 1 = $-0.1$, value 2 should be set to $0.9$
if value 1 = $-0.2$, value 2 should be set to $0.8$
if value 1 = $-0.4$, value 2 should be set to $0.6$
and so on...
Thanks for any help