Trying to be a ham

Ok. I’m taking practice exams. I can usually “pass” but there are some things about theory I’d like to know.

What’s the relationship between frequency and wavelength? So, for the question: “Which amateur band includes 146.52 Mhz?” With answer options: 70 centimeters, 2 meters, 6 meters, 70 meters.

Now, while I don’t know exactly how that all applies (I’d have to look up which wavelengths are used by GMRS/FRS, Tech class, General class, etc)

But how do I know the connection between frequency and wavelength?

Divide 300 by the frequency and you'll get the wavelength in meters.  300 divided by 146.52 equals 2.05 so it's the 2 meter band.