Can someone explain to me step by step how to do these

2)  1/12 times 3/5 = 1*3 = 3     12*5 = 60     3/60 3 and sixty divided by 3
       = 1/20 ANSWER

3) (-5/8)(-12/5) = the two 5's cancel each other. This becomes (-1/5)(-12/5) = 12/8 12 and 8 divided by 4 
= 3/2 ANSWER

4) 6/7 divided by 8/7 becomes 6/7 times 7/8 
7's cancel each other  becomes 6/8  
6 and 8 divided by 2
= 3/4 ANSWER

+1,000)=g7e=mc2-g=7 because if you know algebra you should know g=7 to get your answer