If it is one of the Verbal test that has been omitted, the sum of the scaled scores for the five other Verbal test is multiplied by six fifths (6/5) to yield the Verbal Score. If a Performance test has been omitted, the sun of the scaled scores for the four remaining Performance test is multiplied by five fourths (5/4) to determine the Performance Score. It is possible to prorate four Verbal test by multiplying the sum of their scaled scores by 3/2, and to prorate three Performance test by the factor of 5/3, but this is inadvisable.