Per cent means hundredths. Seven per cent means seven hundredths, 10, or .07. It is written 7%. How many hundredths of a number is its half? many hundredths???? ? ? ?? how What per cent of a number is the half of it? ? ? ? ? 4? ? ? ? ? ? ? ? ? ? 100? 200? ????? 12 400? 15 9 20 25 50 861. What per cent of a number is of it?? ?? ? 4? {? ? ? ? 30? 16? 1%? 2%? 20? 20? 25? 23? 2? 2? 2? 130? $70? 180? 25 10 50 10 20 862. 1 per cent of a number is equal to what fraction of it? 2%? 3%? 4%? 5%? 6%? 7%? 8%? 9%? 10%? 12%? 15%? 20%? 25%? 30%? 36%? 40%? 50%? 60%? 75%? 80%? 90%? 863. What fractions are equal to the following: 121%? 16%? 331%? 371%? 61%? 63%? 31%? 621%? 66%? 871%? 1%? %? 21%? %? 864. 3 times a number is what per cent of it? 21 times? 14 times? 16 times? 4 times? 9 times? TO FIND THE BASE OR THE RATE. 867. Slate Problems. 29. Find 25% of 280. 280 is called the base, 25 is called the rate. Multiplying 280 by 25%, we get 70, which is called the per centage; that is, 100 30. Find x per cent of 65, 31. If x per cent of 65 is 26, find the value of x. 32. Find 25% of x. 33. If 25 per cent of x is 42, what is the value of x? 34. Increase x by 20% of itself. х 35. If x increased by 20 per cent of x equals 132, what is the value of x? 36. Diminish x by 331% of itself. 37. Find the value of x, when x diminished by 33 per cent of itself equals 78. 38. Find 2% of . 39. What is the value of x, if x% of } = 31? 40. Find 1% of x. 41. Find the value of x, when 1% of x 23. 42. What (x) per cent of 65 is 26? 43. 24 is 18 per cent of what number (x)? 44. 250% of what number (x) = 180? 45. What number (x) increased by 25% of itself equals 85? 48. Find the interest on x dollars for 1 year at 51%. 49. What sum at 51% gives a yearly interest of $44? 50. What is 66% of %? 51. What per cent of 88 is 33? 52. Find the difference between of 800 and per cent of 800. 53. Find the selling price of a horse that cost $175 and was sold at 25% profit. 54. How much insurance does a man receive for $12.50 when the rate is 21%? 55. What is 16% of 61? 56. 3 is what per cent of ? 57. What per cent of $389.50 is $124.64? 58. $174.04 is 95% of what sum of money? 59. What number increased by 16% of itself equals 1,276? 60. 984 is 1331% of what number? 61. % of a number is 81. What is the number? 62. An importer paid duties amounting to $386.75. If the duty was 25% of the value of the goods, what was their value? 63. A collector deducts 21% commission, and returns to his employer $745.68. How much did he collect? 64. A commission merchant receives 21% commission for buying grain for a customer. The cost of the grain and his commission amount to $4,223. How much does the grain cost? 65. A capitalist sends a commission merchant $8,670 to invest in cotton and to include commission at 2%. How much does the commission amount to? 66. A commission merchant receives $1,071 to invest in oats after deducting 2% commission. How many bushels of oats at 30 per bushel does he purchase? Should the commission merchant deduct 2% of $1,071, or 2% of the cost of the oats? 67. A house is insured for of its value at 7%. The annual cost (premium) is $8.40. What is the value of the house? 68. What will be the taxes on a house worth $48,000 and assessed at of its value, the tax rate being $18.50 per $1,000 of assessed value? 869. Oral Exercises. 1. 3 is what part of 6? 2. 3 is what decimal of 6? 3. 3 is how many hundredths of 6? 4. 3 is what per cent of 6? 6. What number is 50% of 6? 7. 3 is 50% of what number? 8. 2 is what % of 100? 9. 2 is what % of 200? |