Tara baked 6 1/2 dozen cookies she sold 3 2/6 dozen of cookies she made how many dozens of cookies does tara have remaining

Convert the mixed numbers into improper fractions.
6 1/2= 13/2
3 2/6= 20/6
Now, find a common denominator. In this case, the common denominator is 6.
13/2*3/3=39/6
20/6 stays as 20/6
Subtract both fractions.
39/6-20/6=19/6
19/6 can be written as 3 1/6.
Tara has 3 1/6 dozen of cookies remaining.

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post