According to the information given in the exercise, Harries won by the following ratio:

A ratio can be also written as a fraction. Then you can rewrite it in this form:

Knowing the ratio, you can determine that:

Then:

Notice that the value 9 is obtained by adding the numerator and the denominator of the fraction.
Now you can set up the following proportion:

Where "h" is the number of votes cast for Harris.
Solving for "h", you get:
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