http://www.aaa3.net/calculating-test-score-percentages/

The rates of interest and help please?
I'm stuck with three of the questions on my math homework sheet can someone please help me find how to do them. Q3. Lucy decides to open a bank account. She deposits £ 1,400 with an interest rate of 6% per annum. Calculate the simple interest you earn after (i) 1 year (ii) 3 years 4 th quarter. Gerald scored 52 of 80 in math test and 42 of 60 in science test. What purpose did it better? Q5. An antiques dealer buys a table for £ 7400 and then sells it for £ 12,500. Calculate the percentage of profit made by the antique dealer, giving your answer correct to 3 significant figures. Please help thanks xo
Q4 52/80 = 0.65 42/60 = 0.68 52/80 <42/60 buy Q5 = 7400 = 12 500 and sell = Profit (sale-purchase) / Buy * 100% = (12500-7400) / 7400 * 100 = 68.9%%
Excel 2010 Magic Trick 668: AGGREGATE Function Array Formula #3 Calculate 90 Percentile CPA Scores