Final answer:
Sheri can estimate the gratuity by rounding the bill and the tip percentage to figures that are easy to calculate with, such as rounding to an easily divisible number and using a benchmark percentage.
Step-by-step explanation:
Estimation strategies can be very useful when trying to calculate a gratuity for a service quickly. One way Sheri could estimate the gratuity for the florist is to round the cost of the flowers and the percentage for the tip to numbers that are easy to work with. For example, if Sheri's flowers cost around $85 and she wants to leave a 12% tip, she could use the following strategies:
- Round to $90 and 10%: By rounding the cost to $90 and the tip percentage to 10%, Sheri quickly finds that a 10% tip would be $9.
- Round to $100 and 20%: Alternatively, she could round up to a cost of $100 and use a 20% tip estimation. This would give her an estimated tip of $20, which is higher than the actual tip but can still give her a ballpark figure quickly.
- Use a benchmark percent of 10%: Sheri could also use 10% as a benchmark percent. To get a 12% tip from here, she'd need to add a little more to the 10% estimate.
- Use -10% to estimate 12%: Subtracting 10% from the 12% tip might not be as helpful since it doesn't align as closely with typical estimation rounding.
By using these strategies, Sheri can easily approximate the amount of the tip without needing a calculator.