Convert to a percentage:

Luke went to the grocery store. It took him 15 minutes to drive to the store from his house, 30 minutes to shop, 5 minutes to put groceries in his car, and 20 minutes to drive home due to traffic.

What percentage of the trip did Luke spend inside his car?

Express the fraction as a percentage.

A politician promises to spend a minimum of of his budget on improving roads. What is the minimum percent of the budget that must be spent on roads to keep this promise?

Convert to a percentage:

Round to the nearest integer.

There are 300 sandwiches at a company-wide picnic. If half of the sandwiches are tuna, and the provider mistakenly uses expired tuna in three-fifths of those sandwiches, what percentage of total sandwiches still remain edible?