Answer:
(c) Clark
Explanation:
All of the weights have the same integer part (627), so you only need to compare the fractions.
You know that 0.4 is less than 0.6.
You also know that 3/8 = 6/16 is less than 7/16.
So, you only need to compare 3/8 and 0.4 to determine which is the smaller value.
Here, you can make use of your knowledge of decimal equivalents:
3/8 = 0.375
so 3/8 < 0.4 and the least weight listed is 627 3/8, Clark's weight.
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Additional comment
It is useful to remember the decimal equivalents of fractions with small integer denominators. Here are some unit fractions to get you started:
1/2 = 0.5
1/3 = 0.33...(repeating)
1/4 = 0.25
1/5 = 0.2
1/6 = 0.166...(repeating 6)
1/7 = 0.142857...(6-digit repeat)
1/8 = 0.125
1/9 = 0.11...(repeating)
1/10 = 0.1
1/11 = 0.0909...(2-digit repeat)