Question

8:5=x:x:0.25=4:8 x:7=27:21 32乘以99

Answer 1

8:5=x:10分之3

5x=8*（3/10）

x=2.4/5

x=0.48

x:0.25=4:8

x=（1/2）*0.25

x=0.5*0.25

x=0.125

x:7=27:21

x=(27/21)*7

x=27/3

x=9

32乘以99

=32*(100-1)

=32*100-32*1

=3200-32

=3168