The basic nature and simplified ratio of mathematics ratio in the first volume of the sixth grade of Jiangsu Education Press.

1、3:4=(9): 12= 12:( 16)

2.0. 125: 1 (simplified)

=(0. 125×8):( 1×8)

= 1:8

38 out of 3,95 (simplified rate)

=38:95

=(38÷ 19):(95÷ 19)

=2:5

4. 165438+220 in 0 (simplified scale)

=220: 1 1

=(220÷ 1 1):( 1 1÷ 1 1)

=20: 1

5. 12:9 choose 8 (simplification rate)

= (12× 9): (8×9, 9 in total)

= 108:8

=( 108÷4):(8÷4)

=27:2

Handmade, if you don't adopt. . .