According to United States census data,while there was about one-third of mothers with young children working outside the home in 1975, in 2000, almost two-thirds of those mothers were employed outside the home .
(A) while there was about one-third of mothers with young children working outside the home in 1975, in 2000, almost two-thirds of those mothers were employed outside the home- When a quantity word such as one-third refers to a countable noun such as mothers, a plural verb is required.
...
(A) while there was about one-third of mothers with young children working outside the home in 1975, in 2000, almost two-thirds of those mothers were employed outside the home- When a quantity word such as one-third refers to a countable noun such as mothers, a plural verb is required.
...






