6 is 20% of what number I don’t really need the answer but I have to do a lot of these so I need like instructions on how to figure out the answer

Probably the easiest way to understand is to make 2 ratios, then cross-multiply.

20 = 100% of 20, so

6/x = 20/100
Then cross multiply
600 = 20x
x = 30 percent

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You can also divide the part by the whole:
6/20 = 0.3, then multiply that by 100 to get the percent. 0.3 x 100= 30 percent.

Use which ever one makes the most sense to your brain.

Let me know if you have questions about this process, and I’ll happily help.