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FRACTIONS /PORTIONS /PERCENTAGES AND VERB/HELPING VERB

When an “of phrase”  follows a percentage, distance, fraction, or amount such as a lot of, majority of, rest of, two-thirds of, % of, the verb agrees with the noun written after the preposition “of”. 


Examples:
(i)     Half of these exceptional cases were/was solved by Katherine’s advice.
(ii)  Three-fourths of an acre is/are in the heart of this wilderness right on the mountain.

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