Chapter 1 - Introduction to Algebraic Expressions - 1.7 Multiplication and Division of Real Numbers - 1.7 Exercise Set - Page 58: 95

$\dfrac{10}{43}$

The given expression, $ 4.3 $ is equivalent to $\dfrac{43}{10}$. To find its reciprocal, interchange the numerator and the denominator. Hence, the reciprocal is \begin{array}{l} \dfrac{10}{43} .\end{array}