No, it actually is not!
If you are to change it to a number,
14.5% = .145
If you're familiar with the quadratic equation

well,

is the x component of the vertex, in your case, the vertex is the highest point
figure out what t is at the highest point, and then substitute that back into the equation in order to determine height
x=t in this problem
He ate 90 percent of the pizza on Monday.He ate 30 percent of the pizza on Tuesday
The answer is 8, first you convert 16 1/8 into a decimal and that is 16.125 and then you divide 129 by 16.125 :)