EXPLANATION
The expression 9 3/10 first you be converted into a improper fraction as follows:
9 3/10 = 93/10
Applying the same operation for 2 7/10:
2 7/10 = 27/10
Then, subtracting both fractions:
93/10 - 27/10 = 66/10
Simplifying the fraction:
33/5
The answer is 33/5