Question

Good evening friends plz ans this question ​

Answer 1

Answer:

-3/10 - 21/20

= -60-210/200

= -270/200

Answer 2

Answer:

cross multiplication =3*5=15, 4*2=8,=15/8

                                   3*5=15,4*7=28=15/28

Step-by-step explanation:

next we should ;

                          Least common multiple (LCM) of 8 and 28 is 56.