1.How the value of TC is considered as positive and negative?

Solution in text book:
A positive value of TC indicates that there is increase in Vz due to increase in temperature or decrease in Vz due to decrease in temperature. The negative value of TC indicates that there is increase in Vz due to decrease in temperature or decrease in Vz due to increase in temperature.

2. In a replied thread shown that 1%/°C=0.01 and 0.05%/°C=0.0005. My question is how 1%/°C=0.01 is considered and on what basis?



Please give me solution for the above two questions

Thank you

 

Homework is it?

 

1% means 1 per cent, which means 1 per 100,
which means 1 for every 100.