a) Given :
51 pounds of seed can be planted in = 9 acre field.
Per pound of seed = [tex]\frac{9 \ acre}{51 \ pounds \ of \ seed}[/tex]
We can convert 9/51 in simplest fraction by dividing top and bottom by 3.
We get
[tex]\frac{9/3}{51/3}=\frac{3}{17}[/tex]
b) $10 amount = 16 pounds of sugar.
$1 amount = 16/10 = 1.6 pounds of sugar.