Allan Y. answered 04/11/23
Experienced Guitar Teacher With Proven Track Record!
If you don't have much background in music theory, it MAY be easier to explain a major pentatonic scale first.
Think of going up 'Do, Re, Mi, Fa, Sol, La, Ti, Do and taking out 'Fa' and 'Ti' in the process.
In more theoretical terms, it's a major scale with the 4th and 7th omitted.
To circle back to your question, every major key has a relative minor. In simple terms this could be thought of as 'La, Ti, Do, Re, Mi, Fa, Sol, La' and in the case of the minor pentatonic, 'Ti' and "Fa' (now the 2nd and the 6th) would still be omitted.