Answer:
$0.52
Step-by-step explanation:
A 15% tip would be ...
0.15 × $9.85 = $1.48
$2 is more than that amount by ...
$2.00 -1.48 = $0.52
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Alternate answer
Salvador left a tip of $2.00/$9.85 × 100% ≈ 20.3%. That is about 5.3% of the bill more than 15% of the bill.
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Comment on the alternate answer
One needs to be very careful when talking about differences and changes in percentages. 20.3 is about 35.4% more than 15.0, using 15.0 as the reference value. This percentage change is computed as (20.3/15.0 -1)×100%.
However 20.3% of 9.85 is 5.3% (of 9.85) more than 15.0% (of 9.85). This difference is found by subtracting, not by computing the percentage change.
