#### Answer

a. 1/13
b. 15/7
c. -1/5
d. -11/8
e. 1/7.9

#### Work Step by Step

A whole number like 13 in fraction form is 13/1. Negative numbers like -5 can have a fraction form like -5/1. Decimals like 7.9 can be seen as 7.9/1. A reciprocal is just a switch of the numerator and the denominator. So 13/1 has a reciprocal of 1/13. 7/15 has a reciprocal of 15/7. -5/1 has a reciprocal of -1/5. -8/11 has a reciprocal of -11/8. And 7.9 has a reciprocal of 1/7.9.