Answer:
Restaurant: 10%
Florist: 10%
Cab Fare: 0%
Dog Grommer: 5%
Step-by-step explanation:
Essentially, the question is asking us to round each of the tax percentages. 
So, let's go through each of the services and round the tax to a reasonable number. 
Restaurant: 
The tax here is 8.5%. 
Rounding to 5% would be a bit too low, and 20% would be too high. So, the only reasonable estimate here is 10%. 
Florist: 
The tax here is 12%. 
Rounding to 5% would be too low, and 20% would be too high. 
10% is just a bit lower, so it's the most reasonable. 
Cab Fare: 
The tax here is 0%. 
Since it's at 0, there's no need to add anything to it. So, it would just stay 0. 
Therefore, the most reasonable estimate is 0%.
Dog Grommer: 
The tax here is 5.75%. 
Again, 0% is too low, 10% is a bit too high, and 20% is way too high. 
So, the only reasonable estimate is 5%. 
And we're done!