If \(a = \frac{{{{\left( {5.4} \right)}^3} + {{\left( {4.5} \right)}^3}}}{{{{\left( {5.4} \right)}^2} - {{\left( {4.5} \right)}^2}}}\) and \(b = {(1.0\bar 3 \div 0.\overline{93}) \times 1.\overline {36} }\), then (a - b) is equal to:
1
28.5
2
26.4
3
25.5
4
27.9