Question

what are the effects which can be applied to the cell values ​

Answer 1

I think this might help (or need more explanation). You need to use conditioning in formula:

IF( condition, [value_if_true], [value_if_false] )

A1: 20% contains the percentage of substances (or heat level, or what ever)

then in B1 write the following: =IF (A1>30%;"Positive";"Negative")

Please, try)

Answer 2

Answer:

I think this might help (or need more explanation). You need to use conditioning in formula:

IF( condition, [value_if_true], [value_if_false] )

A1: 20% contains the percentage of substances (or heat level, or what ever)

then in B1 write the following: =IF (A1>30%;"Positive";"Negative")

Please, try)

Explanation: