C. 1/4, 3/8, 2/5
Rewriting as fractions if necessary:
3/8, 1/4, 2/5
The least common denominator (LCD) is:40.
Rewriting as equivalent fractions with the LCD:
15/40, 10/40, 16/40
Ordering these fractions by the numerator in order from least to greatest:
10/40 < 15/40 < 16/40
Therefore, your input in order from least to greatest is:
1/4 < 3/8 < 2/5