ughhhh i need help im so stuck and i asked for help but nobody knows how please help

1.8c = 5.5 This problem becomes a lot simpler if you write it as

(1 8/10) c=5 1/2 or that (18/10 )c = 11/2

Now divide each side by 18/10 and have c=11/2 ÷18/10=11/2 × 10/18 = 110/36 =55/18.

Now if you need inaccurate approximations, feel free, to use your calculator or do the division by hand.