What is the answer to 7/8 - (-1/10) + (-3/5)

3/8

Step-by-step explanation:

Find and apply the LCD. In this case we have the three denominators 8, 10 and 5, which in factored form are 2 (4), 2 (5) and 1 (5). The factors that make up the LCD are 2, 4 and 5, or 40. Note that 8, 10 and 5 all divide evenly into 40.

So our expression, 7/8 - (-1/10) + (-3/5), can be rewritten as:

35/40 + 4/40 - 24/40, which simplifies first to 39/40 - 24/40, and then to:

15/40.

This 15/40 reduces to 3/8.