The area of the pizza is <span>20.37.
Hope this helps ^^</span>
Let's say the number is 9. 10% of 9 is 0.9. Add that to 9 and you would get 9.9. 10% of 9.9 is 0.99. Subtract and you would get 8.91. Then you could do the rest.
(4 1/3 * (-1) * 5) / 12 = -1.80555556