How do you determine your monthly or quarterly savings budget?

[deucher]

When I decided that I needed to properly manage my finances and start saving, I didn't understand what amounts were optimal for me, so I experimented every time to make it easier for me to pay bills and save. I am currently trying to save up to 20 percent of my income, although this does not always work out because my income is not stable, so when I earn less, I cannot save the same because my expenses have not decreased.