Respuesta :

Answer:

2.1 pounds more

Step-by-step explanation:

15.7 - 13.6 = 2.1

Answer:

15 7/10-12 3/5

convert into improper fractions

157/10-63/5

denominator's must be same to subtract

157/10-126/10

31/10

Sally weights 31/10 more pounds or 3.1 more pounds