Question

Perform the operation(s) and write the answer in simplest form.
12 2/5 - 5 1/10
A.) 7 1/5
B.) 7 1/10
C.) 7 3/10
D.) 7 4/10

Answer 1

First do 12-5, which equals 7.  Next, subtract 1/10 from 2/5.  2/5 is the same as 4/10 if you multiply both the numerator and denominator by 2.  4/10-1/10=3/10. Now add 7 and 3/10.  You will get 7 3/10 as the answer, which is letter C.)