What is the specific operation method of 3 / 4 × 1 / 5 + 3 / 4 + 0.75 × 3 / 5-3 / 4

What is the specific operation method of 3 / 4 × 1 / 5 + 3 / 4 + 0.75 × 3 / 5-3 / 4

simple form
=3 / 4 × 1 / 5 + 3 / 4 + 3 / 4 × 3 / 5-3 / 4
=3 / 4 × (1 / 5 + 1 / 5 + 3-1 / 5)
=3 / 4 × 4 / 5
=3 / 5