Hello, I'm coming here because I need help understanding a few math concepts, and this looks like a friendly community .

At the moment, I need help learning how to quickly and easily convert between radians and degrees. I am schooled over the internet, and they don't go into much detail in this section of the textbook.

The examples they give are:

Convert 300 degrees into radians.

It then shows the formula: 300 degrees = 300 degrees ((pi)radians/180 deg.)

giving the final answer of 5/3pi radians. How do I arrive at this answer?

The other example is:

Convert -3/4pi radians to degrees.

For this one the formula is not given, but they end up with -135 degrees.

Any help would be appreciated