45 / 18 as a mixed fraction...
To change the improper fraction to the mixed fraction you have to:-
first divide (as you divide) so that you can get remainder, quotient, divisor and dividend.
i.e 45 is dividend and 18 is divisor.
45 / 18 = 2 9 / 18 where 2 is quotient and 9 is remainder...
so the ans is 2 9 / 18
39.99+.10t=19.99+.20t
Now -19.99 from both sides to get 19.00+.10=.20t
Now simplify 19+.10 to 19.10=.20t
Lastly divide both sides by .20 to get t=95.5 :)
10:20 and 20:30 form a ratio
I don’t think this would exist because it would be only on the -2 point.