Hard Math problem i cant seem to figure it out?

the 10inch pizza sells for 4.99 at my favorite pizza store. the store claims they have a great deal on the large 12inch pizza which is specailly priced at 5.75 what is the percent discount the store is offering?Hard Math problem i cant seem to figure it out?
= (100%)([{4.99/(蟺[10/2]虏)} - {5.75/(蟺[12/2]虏}]/[4.99/{蟺(10/2)虏])

= (100%)([{4.99/25蟺} - {5.75/36蟺}]/[4.99/25蟺])

= (100%)([{179.64 - 143.75}/900蟺][25蟺/4.99])

= (100%)([35.89/900蟺][25蟺/4.99])

= 100%(35.89/179.64)

= 358,900/17,964% or 19 4,396/4,491%



Answer: 19.9788 2,092/4,491% exactly or 20% approximately
Create a porportion. If 10 in pizza costs 4.99 then what would a 12 inch pizza usually be? Calculate the area of hte 10 inch pizza and hte area of hte 12 inch pizza. Create a porportion with 4.99/10 inch pizza area=x/12 inch pizza area. X is what a 12 inch pizza would usually cost and 5.75 is the marked down price. Then figure out the discout. i think you would know the last part.Hard Math problem i cant seem to figure it out?
it's a 20% discount. You have to determine the cost per square inch. I am assuming that 10 inches refers to the diameter, so the radii are 5inches and 6 inches and the areas are pi*r^2



4.99/78.5398=$.06353 per square inch.



113.097*.06353=$7.185, what they would have charged for the 13 inch pizza



5.75/7.185=.8 which is a 20% discount