A more detailed explanation of your problem is usually helpful in cases like this! After a bit of puzzling things out, I think you're asking: why is the first answer in this example cloze multichoice question getting full credit?
If I've guessed correctly, I think you're confused about what "=" means. "=" in front of the answer "to" makes it a correct answer. Take a look at the documentation, specifically #7 in that list. Based on your screenshot, it looks like either "to" (from the "=" in front of it) or "in" (from the "%100%") are answers that get full credit.
If that's not what you meant, could you rephrase your question and/or provide more details about your problem?