Answer:
By 20% : Yuan 6.7583\$
By 30% : Yuan 6.2385\$
Explanation:
Original exchange rate = Yuan 8.11/$
If the Yuan is revalued against the US dollar, it means it would take less Yuan to trade for a dollar, which would represent a decrease in the exchange rate.
1.) If the Yuan is revalued by 20%
[tex]r_{20} = \frac{Yuan\ 8.11/\$}{1+0.20}=Yuan\ 6.7583/\$[/tex]
2.) If the Yuan is revalued by 30%
[tex]r_{30} = \frac{Yuan\ 8.11/\$}{1+0.30}=Yuan\ 6.2385/\$[/tex]