Math
posted by Sandra .
Estimate a 15% tip for each amount.
$9.89
$27.59

0.15 * 10 = $1.50
10% of 28 = 2.80
2.80 * 2 = 5.60
The tip should be about half way between 2.80 and 5.60 
Thank you and I'm sorry for accidentally posting a few times. I'm truly sorry for asking the same question repeatedly because it said it wasn't submitting because there was no signal.
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