2.51 in expanded and word form

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate. true or false?