what is the answer? 6 7/8 x 12

Since 6 7/8 equals ((6*8)+7)/8=55/8, 6 7/8 x 12= 55/8 x 12. you can divide the denominator on 55/8 by 4 to get 55/2, and divide 4 on the numerator 12 to get 3. (Notice that I divided the denominator on one number, and the numerator on the other, by the same number), to get 55/8 x 12=55/2 x 3=55/2 x 3/1. The product of the numerators are 55 x 3= 165, and the product of the denominators are 2 x 1=2. Therefore, 6 7/8 x 12=165/2, which is 82.5 in decimal.