I've been trying for a couple of hours to conditional colour format cells based on cell value but can't get it right. I have the formulas but I only seem to be able to enter 1 formula but I need to enter 3?

My rules are:

If B7=>99 but less than 99.9 then shade amber

If B7<99 then shade red

If B7=100 then shade green

Any help is much appreciated in how I can enter 3 different formulas

Michael