What percent did the female workforce increase between 1940 and 1945

6%. By 1940, the number was 28%, by 1945, the number was 3%.

Explanation:

Women and post war wages were studied, with emphasis on the work women do and how it impacts wages before ad after the Second World War. The researchers looked at the increase in the employment of women between 1940 to 1950, when the war was said to have ended. It was observed that by 1940, about 28 percent of women were working and by 1945, a 6% increase was noticed, bringing the number to over 34%.

10%

Explanation:

Between 1940 and 1945, the female percentage of the United State workforce increased about 10 percent, the percentage increase is from 27 percent to about 37 percent, and by 1945 it was reported that nearly one out of every four married women in the U.S worked outside the home.

It occurs that American women entered the workforce in unprecedented numbers during the war, this is as a result of widespread male enlistment which left gaping holes in the industrial labor force.