What is 9/10-1/5 equal

1/5 = 2/10

9/10-2/10=7/10

Answer; 7/10

9/10 - 1/5

The denominators have to be the same number so multiplying 5 by 2 will make the denomintor 10 which will be the same for 9/10 but if you multiply the denominator you also multiply the numenator by 2 which is 2/10

So 9/10-2/10 = 7/10

7/10 is the answer