Ответ:

\(2\frac{5}{72}=\frac{149}{72}\), \(2\frac{5}{45}=\frac{19}{9}\).

\(\frac{149}{72}-\frac{19}{9}+\frac15=\frac{79}{120}\).

\(\frac{79}{120}:\frac34+\frac14=\frac{79}{90}+\frac14=\frac{203}{180}=1\frac{23}{180}\).

Ответ: \(1\frac{23}{180}\).