2. 44 4/9 or 44.44

3. 31.25%

4. 18 2/11 or 18.18

5. 56.25%

of 80 transfer to “times 80”

is 3.2 transfer to “=3.2”

2) 9% of what number means “times x” is 4 is “=4”

3) Same as #1

4) Same as #2

5) Now 50% are girls. Now, how many are in the class (you can figure that out). After the 4 join, how many will be girls? Figure that out.

.04 = x

3.2 is 4% of 80

#2: 4 = .09X

4/.09 = x

44.4 = x

9% of 44.4 is 4

#3: 20/64 = x

.3125 = x

20 is 31.25% of 64

#4: .22x = 4

x = 4/.22

x = 18.18

22% of 18.18 is 4

#5: 32 – 4 = previous number of students

28 = previous number of students

28 (.5) = previous number of girls

14 = previous number of girls

14 + 4 = new number of girls

18 = new number of girls

18/32 = new percent of girls

.5625 = new percent of girls

Girls would then make up 56.25% of the class.