percent & currency question?

After a loss of 10% in the first year and a gain of 40% in the third year, the cumulative loss was 37%. What was the rate of return in the second year?
For full marks your answer should be rounded to the nearest hundredth of a percent.

The Black’s assets are to be divided among their three children Wasim, Cedric, and Agnessa in the ratio of 6 : 5 : 3.

a) If Agnessa received ,000 from the sale of securities, what amount should Wasim receive?
For full marks your answer should be rounded to the nearest cent.

b) What amount should Agnessa receive from the sale of her parents’ boat for ,000?
For full marks your answer should be rounded to the nearest cent.

Orla has just returned from a business trip in Britain with £300 of uncashed traveller’s cheques. How much would she receive from the bank when she converts the currency back to Canadian dollars, assuming that the bank offers an exchange rate of C.00 = £0.4421 and charges a 0.70% fee to convert the traveller’s cheques to Canadian funds?
For full marks your answer should be rounded to the nearest cent.
please help!!