Respuesta :

Answer:

39/40

Step-by-step explanation:

-25/40 + 64/40 already has a common denominator so you just need to add the numerators. -25 +64 = 39 over the denominator of 40.

39/40

Step-by-step explanation:

-5/8 + 16/10 = -5/8 + 8/5 = -25+64/40 = 39/40