At a supermarket, a certain item has increased from 75 cents per pound to 81 cents per pound. What is the percent increase in the cost of the item?
There was an 8% increase in the cost of the item.
If the price of gas increases from $1.00 per gallon to $1.21 per gallon, what is the percent of increase?
The percent of increase is 21%.
Howard bought a guitar for $10 and sold it for $22. What percent profit did Howard make on the guitar?
The percent of profit was %