Ratio is:
[tex]3:7[/tex]
it means you have to sum
[tex]3+7=10[/tex]
Now you have to divide [tex]300[/tex] by [tex]10[/tex]
[tex]300/10=30[/tex]
Now multiplay
[tex]3*30=90[/tex]
and
[tex]7*30=210[/tex]
so £[tex]300[/tex] in ratio [tex]3:7[/tex] will be [tex]90:210[/tex]
