Express all the fractions as decimals (divide them)
5/8 = 0.625
1/2 = 0.5
2/3 = 0.6666666
2/5 = 0.4
From least to greatest:
0.4-0.5-0.625-0.66666
2/5 - 1/2 - 5/8 - 2/3
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