$325\mathrm{.}41/$USD by August $18.$ Similarly, the naira fell from NGN $221\mathrm{.}9687=1\mathrm{.}00$ EUR to NGN $316\mathrm{.}0274/$EUR on June $20,$ and NGN $348\mathrm{.}9825/$EUR on August $18,$

a$.$ What was the percentage change in the value of the Nigerian naira versus the dollar the first trading day?

b$.$ What was the percentage change in the value of the naira versus the dollar by August $18,2016?$

c$.$ What was the percentage change in the value of the Nigerian naira verus the euro the first trading day?

d$.$ What was the percentage change in the value of the naira versus the euro by August $18,2016?$

a$.$ What was the percentage change in the value of the Nigerian naira versus the dollar the first trading day?

The percentage change in the value of the Nigerian naira versus the dollar the first trading day was $\%.($Round to two decimal places.$)$

b$.$ What was the percentage change in the value of the naira versus the dollar by August $18,2016?$

The percentage change in the value of the naira versus the dollar by August $18,2016$ was $\%.($Round to two decimal places.$)$

c$.$ What was the percentage change in the value of the Nigerian naira verus the euro the first trading day?

The percentage change in the value of the Nigerian naira verus the euro the first trading day was $\%.($Round to two decimal places.$)$

d$.$ What was the percentage change in the value of the naira versus the euro by August $18,2016?$

The percentage change in the value of the naira versus the euro by August $18,2016$ was $\%.($Round to two decimal places.$)$