To build a highway, 5 / 8 of its total length has been built. What has been built is the rest. What is left is the rest. What is left is the rest of its total length

To build a highway, 5 / 8 of its total length has been built. What has been built is the rest. What is left is the rest. What is left is the rest of its total length

What has been repaired is the rest: 5 / 8 ÷ (1-5 / 8) = 5 / 3
The rest is repaired: (1-5 / 8) △ 5 / 8 = 3 / 5
The rest is full length: 1-5 / 8 = 3 / 8