Find out the missing number in the following:

9/5 : 7/4 : : 3/5 : ______

Calculate the compound interest compounded half yearly for 1 year on $10000 at an interest rate of 6% per annum.

Andy takes a loan of $10000 from a bank for a period of 3 years at 10% annual rate of interest. Calculate his EMI(Equated Monthly Installment).

Adam and Brian start a business. Twice the investment made by Adam is equal to thrice the investment of Brian. Calculate Brian's share if there is a profit of $2500 in the business.

Calculate the median from the following table:

This question is based upon the figure shown below

Calculate the composite depreciation rate from the following table:

Find the selling price of an article when the cost price is $50 and the gain is 20%?

George and Michael start a business by investing $15000 and $20000 respectively. Michael leaves the business after 5 months but does not take back his invested amount while leaving. Samuel joins the same business after 5 months by investing $10000. There is a profit of $4000 at the end of the year. What is Samuel's share in the profit?

If the true discount on a bill is $150 and its present worth is $1500, what will be the banker's gain?

The compound interest earned over 5 years on a certain sum of money is $1000 at an interest rate of 20% per annum. How much interest would have been earned if simple interest had been charged instead of compound interest?