Zara had 100 blue pens and 50 white pens. Zara gave away 20% of her blue pens and 60% of her white pens. What percentage of her pens left was white?
Percentage of blue pens left
= 100% - 20%
= 80%
Number of blue pens left
= 80% x 100
= 80100 x 100
= 80
Percentage of white pens left
= 100% - 60%
= 40%
Number of white pens left
= 40% x 50
=
40100 x 50
= 20
Total number of pens left
= 80 + 20
= 100
Percentage of pens left that are white
=
20100 x 100%
= 20%
Answer(s): 20%
