minus 170 dBc
170 - 70 = 100
170 - (40%) = 102
170
95p
200 - 30 = 170
200 - 15% = 200 - 15% of 200 = 200 - 30 = 170
-170 C-17 °C
-274
The subtraction gives you -170 degrees Celsius.
Methane, at minus 170 degrees C, or at minus 170 degrees F, is a gas. It is a solid below -182.5 oC (-297 oF) It melts at that temperature and becomes liquid. Liquid methane boils at -161.6 oC (-259 oF) and becomes its form we may be more familiar with, gas.
Like If You Have 48p and You Had 95p and you have to have £1.24! So If there wasn't "+" you wouldn't know.