A student didn't notice that her pipet tip was broken. She used the pipet properly but it consistently delivered 4.70 mL of vinegar instead of the...

A student didn't notice that her pipet tip was broken. She used the pipet properly but it consistently delivered 4.70 mL of vinegar instead of the desired 5.00 mL. How would the percent by mass results obtained have been affected? Explain your answer.