A thermometer is shown in the afternoon. If the temperature drops 5 degrees at night, how many degrees is the new temperature in Celsius?

the gragh shows a thermometer that has celcess and ferenhight the farenhight
it is counting backwords by two's all the way up to 160 then the celcest says counting by tens all the way up to 70 the a ansewer block in beween 10 and the marks of 20
the numbers to ferenhight are -20,0,20,40,60,80,100,120,140,and 160
the numbers provided in celcess are -30,-20,-10,0,10,20,30,40,50,60, and 70

If the temperature drops 5 degrees at night, the new temperature in Celsius would be 5 degrees less than the initial temperature shown on the thermometer.