2 1/2 – 2/5 x 1 2/3=…

5/2 – 2/5 ×5/3
5/2 – 2/3
15/6 – 4/6
11/6

2 1/2 – 2/5 x 1 2/3
= 1 – 0,4 x 0,67
=0,732