Step-by-step explanation:
7/10 - 1/2 = 7/10 - 5/10 = 2/10
Answer:
4/4
since similar, then
EF/BC = DF/AC
EF = BC•DF/AC
= 18•10/12
= 15
6.42857143 so you can just say 7
45/7 = 6.42857143