The Answer is that the present value of $100 is $100. Because this $100 dollar is deposited today so the time is equal to zero and when time is zero the value of amount is the value of amount itself.
21.95×.2=4.39
21.95-4.39=17.56
the discount is $4.39
and the total sale price is $17.56
10/4 + 1/3 = 17/6
step 1: reduce the fraction with 2:
5/2 + 1/3
step 2: write all numerators above the common denominator 6:
15 + 2/ 6
step 3: add the numbers:
17/6