We can find the Unit Price of the box. Both boxes will have the mass and price printed on them. Suppose firat box if of 2 kilogram and costs $10. While second box is of 5 kilogram and costs $25. We can divide the price by mass and find the unit price. So Unit price = 25/5 = $5 per kilogram Similarly The other one also gives the same answer 10/2 = $5 per kilogram
This is how we can compare the prices using unit rates.
