At the local Bulk Store 250g of Lucky Charms costs $4.50 and 400g of Cheerios costs $6.25. How much cheaper is 1500g of Cheerios compared to the same amount of Lucky Charms?

Answer 1

In pennies, 450/250 = 45/25 = 9/5 = 1 and 4/5 = 1.8 cents per gram

625/400 = 25/16 = 1 and 9/16 = 1.5625 cents per gram

The difference per gram is 0.2375 cents per gram.

In dollars, that is 0.002375

So to calculate the difference in price, the formula is 0.002375 * W where w is the weight in grams