Question

How much of the circle is shaded? Write your answer as a fraction in simplest form. 1/4 2/5

Answer 1

all added parts must equal 1, therefore:

1/4 + 2/5 + x = 1

Where:

x = shaded part

Let's solve for x:

1/4 + 2/5 + x = 1

13/20 + x = 1

Subtract 13/20 from both sides:

13/20 + x - 13/20 = 1 - 13/20

x = 7/20