The population you gave isn't formatted correctly so I'll solve the problem assuming you mean 103,500.
First we find the number of males from the percentage given:
0.56 * 103500 = 57960 males
Subtract the number of males from the total population to get the number of females:
103500 - 57960 = 45540 females
You could solve the problem by finding the percentage of females first. Since there are 56% males, that means there are 100-56 = 44% females.
0.44 * 103500 = 45540
The answer is 45540.
