27 and 28 because their sum is 55 and 28-27=1
100 is in a full fraction, so we have 5 100's. The answer is 5.
*115*
do the parentheses in the parentheses first, then the outer parentheses, then the stuff outside the parentheses.
PEMDAS
parentheses...exponents...multiplication/division...Addition/subtraction.
2/3 because you can divide the top and bottom by 8