Answer:
The difference between the two throws is 6/7 yards
Step-by-step explanation:
Beatrice throw=1 7/14 yards
Tilly throw=9/14 yards
Difference between the two throws=Beatrice throw - Tilly throw
=1 7/14 - 9/14
=21/14 - 9/14
= 21-9/14
=12/14
=6/7 yards
The difference between the two throws is 6/7 yards