math needed help

Question

In Dover's wig shop, 1/4 of the wigs are blonde and 1/10 of the wigs are brunette. What fraction of the wigs are either blonde or brunette?

as a fraction or as a whole or mixed number.

Answer 1

In order to complete this question, we need to find the least common denominator (LCD). In this case, that is 20. So for 1/4, we need to multiply both the numerator and denominator by 5 to get the LCD of 20. Therefore, 1/4 would be equal to 5/20.

For 1/10, we know that 10x2=20, so we need to multiply both the numerator and denominator by 2 in order to get the LCD of 20. Therefore, 1/10 would be equal to 2/20.

Now we can add the two fractions together, since this problem is asking what fraction of the wig shop is either blonde or brunette.

5/20 + 2/20 = 7/20