ggplot2 – How can I reset the y-axis scaling to display only 0 to 100?

I'm trying to create a chart with the x-axis (the type), y-axis the value of the type. The value is% character with many values ​​in the original record.
The result then shows thousands of numbers on the Y-axes. How should I reset the Y-axes from 0 to 100 and then display the representation with goem_point ().

ggplot (mydata, aes (coralType, value))

Result Screenshot