7/12,  3/4,  4/7,  5/8,  4/7
Answer:  
Order from Least to Greatest
4/7    =       4/7     <       7/12    <    5/8   <   3/4  
Showing Work  
Rewriting as fractions if necessary:  
7/12, 3/4, 4/7, 5/8, 4/7  
The least common denominator (LCD) is: 168.  
Rewriting as equivalent fractions with the LCD:  
98/168, 126/168, 96/168, 105/168, 96/168  
Ordering these fractions by the numerator in order from least to greatest:  
96/168    =    96/168     <     98/168    < 105/168    < 126/168  
Therefore, your input in order from least to greatest is:
Answer   =======>   4/7    =   4/7    <    7/12    <     5/8    < 3/4
B):   1.35,   5/4,   1.349,  6/5, 7/6
Number of inputs ====>  5
Answer => Ascending Order:  Least to Greatest =====>  7/6, 6/5, 5/4, 1.349, 1.35
C):   0.819,  0.8199, 81/100, 815/1000
Number of Inputs  ======>    4
Answer  ==> Ascending order (Least to Greatest ====>    81/100, 815/1000, 0.819, 0.8199
D):    3  4/7, 245/70, 3.572, 90/29
Number of Inputs:  4
Answer ==>  Ascending Order(Least to Greatest) ==> 90/29, 245/70, 3.572, 3 4/7
Hope that helps!!!!                                              : )