1/5, 5/8, 2/3 from least to greatest.
1/5 = 0.20 x 100% = 20%
5/8 = 0.625 x 100% = 62.50%
2/3 = 0.667 x 100% = 66.70%
It is easier to convert dissimilar fractions into decimals to know which fraction has greater or lesser value compared to the other fractions.
The answer should be impossible, as it never said there were blue cards in that bag.