Question

化简比2/3:2/5，3.6:2.7，0.45:0.9，2/15:4/15 ，3/4:9/16 ，0.2:2/3

Answer 1

2/3:2/5，
=2/3*5/2
=5/3
=5:3

3.6:2.7，
=0.9*4:0.9*3
=4:3

0.45:0.9，
=0.09*5:0.09*10
=5:10
=1:2

2/15:4/15 ，
=2/15*15/4
=2/4
=1/2
=1:2

3/4:9/16 ，
=3/4*16/9
=4/3
=4:3

0.2:2/3
=1/5:2/3
=1/5*3/2
=3/10
=3:10

Answer 2

2/3:2/5=2/3×5/2=5/3=5:3
3.6:2.7=(3.6÷0.9):(2.7÷0.9)=4:3
0.45:0.9=(0.45÷0.45):(0.9÷0.45)=1:2
2/15:4/15=2/15×15/4=1/2=1:2
3/4:9/16=3/4×16/9=4/3=4:3
0.2:2/3=(0.2×15):(2/3×15)=3:10