What is 1.45 as a mixed number in simplest form?

Answer is (1 9/20) because 1 and 45/ 100 can be simplified by divided 45/100 by 5.  45 divided by 5 is 9 and 100 divided by 5 is 20.  A mixed number is a combination of a whole number and a fraction.  The whole number is 1 and the fraction is reduced to 9/20.

1.45 as a mixed number is 1 (9/20) because if you put 1.45 as a fraction divided 45 and 100 by 5 and you get 1 (9/20) as a fraction.

Ibelieve the total for the tip could be $21.90