The on an investment is the investor’s gain or loss on the investment over a period of time.

I think the answer is the rate of return on an investment is the investors gain or loss on the investment over a period of time.

it makes the words sound jumbled, and it is not easy to read. As a result of that, Kafka's work requires a 100 percent literal, word-for-word translation.

The Metamorphosis is a novella by Franz Kafka that was first published in 1915. That tell the story of Gregor Samsa, a traveling salesman, who wakes up in his bed to find himself transformed into a large insect.