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%.

A manufacturing company with 200 employees begins a new product line and must add 76 more employees. What is the percent of increase in the number of employees?

The percent of increase is %