The fraction 2/42 is equal to 4.76% when expressed as a percentage. This small percentage represents about 1/21 of a whole, which isn't a very large portion. It's less than 5%, so it's a pretty small slice of the pie, so to speak.
To put this in perspective, if you had 42 cookies and gave away 2 of them, you'd be giving away 4.76% of your cookies. Or if you spent 2 minutes out of a 42-minute class period daydreaming, you'd have spent 4.76% of the class not paying attention. While it may seem like a tiny amount, these small percentages can add up over time in various situations.