Answer: 3/10
Step-by-step explanation: To subtract unlike fractions such as 3/5 - 3/10, we first need to find a common denominator.
The common denominator of 5 and 10 is the least common multiple of 5 and 10 which is 10. To get 10 in the denominator of our first fraction, we multiply the numerator and denominator by 2 and we will get 6/10.
Notice that our second fraction already has 10 in the denominator so it stays the same. Now, we can subtract our fractions.
6/10 - 3/10 = 3/10
Therefore, 3/5 - 3/10 = 3/10