Kaifeng Montez can buy:
8-slice Pepperoni pizza for $15.92
or
12-slice pizza for $22.32
One slice of Pepperoni pizza is $15.92 ÷ 8 = $1.99
One slice of the second brand pizza is $22.92 ÷ 12 = $1.86
So a piece of the second brand pizza is cheaper that a piece of Pepperoni pizza.
The second brand pizza (12-slice pizza) therefore is a better deal.