[Question]: Erica is getting dessert at a pie buffet where all the pies are the same size. She takes 1/5 of an apple pie and 3/4 of a cherry pie. What fraction of a whole pie did Erica take, expressed as a percentage?
[Answer]: First, find a common denominator for the fractions by multiplying 5 and 4: 5 * 4 = 20. Then convert 1 / 5 to twentieths by multiplying the top and bottom by 4: 1 / 5 * 4 / 4 = 4 / 20. Then convert 3 / 4 to twentieths by multiplying the top and bottom by 5: 3 / 4 * 5 / 5 = 15 / 20. Now that the two fractions have the same denominator, you can add them: 4 / 20 + 15 / 20 = 19 / 20. Now divide 19 by 20 and multiply the answer by 100 to convert the fraction to a percentage: 19 / 20 * 100 = %95.
So the answer is 95.

[Question]: A lumberjack is chopping down trees so he can sell firewood. Each tree he chops produces 4 logs each, and each log is then chopped into 5 pieces of firewood. If the lumberjack has chopped 500 pieces of firewood, how many trees did he chop down?
[Answer]: The firewood is made from 500 pieces of firewood / 5 pieces of firewood per log = 100 logs. So the logs are chopped from 100 logs / 4 logs per tree = 25 trees.
So the answer is 25.

[Question]: Eliza buys 200 ornamental rings to sell in their local shop, twice the number of the remaining stock. After selling 3/4 of the total stock, her mother buys 300 more ornamental rings, and after three days, sells 150. What's the total number of ornamental rings remaining in the store?
[Answer]:
If Eliza restocked twice the original number of ornamental rings, the number was 200 / 2 = 100 rings. The total number of ornamental rings in stock is now 200 + 100 = 300 rings. When she sells 3 / 4 of the stock, the total number of rings sold is 3 / 4 * 300 = 225 rings. The remaining stock is 300 - 225 = 75 rings. When her mother buys 300 more rings, the stock is boosted to 75 + 300 = 375 rings. She then sells out 150, reducing the stock to 375 - 150 = 225 rings.
So the answer is 225.