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OpenStudy (anonymous):
A lunch check is $27.95. Estimate a 15% tip.
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OpenStudy (anonymous):
use 15% of 28
OpenStudy (anonymous):
10% of 28 is 2.8, half of 2.8 is 1.4, add to get 2.8+1.4=4.2
OpenStudy (anonymous):
so tip is $4.20 but don't be cheap, leave the whole fin at least
OpenStudy (anonymous):
x 15 -- = -- 27.95 100 27.95 * 15 --------- = x 100 419.25 ------ = 4.1925 ≈ $4.20 100
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