3/4*2/5; 3/5* 20/21; 6*4/3; 3/8*10/11; 3/10*15; 5/4*5

Question

3/4*2/5; 3/5* 20/21; 6*4/3; 3/8*10/11; 3/10*15; 5/4*5

Answer 1

3/4*2/5=3/10
3/5*20/21=4/7
6*4/3=6/1*4/3=8
3/8*10/11=15/44
3/10*15=3/10*15/1=4 1/2
5/4*5=5/4*5/1=6 1/4

Answer 2

3/4*2/5=3/2*1/5=3/10
3/5*20/21=1/1*4/7=4/7
6*4/3=2*4=8
3/8*10/11=3/4*5/11=15/44
3/10*15=3/2*3=9/2=4 1/2
5/4*5=25/4=6 1/4