Case 10th. To find the value of a fraction in the known parts of the integer. Example. RULE. Multiply the numerator by 9) 100 the next lower denomination, and divide by the denominator ; 11.1 if any thing remain, multiply it 12 pence = 1 sg. by the next lower denomination, 9) 12 and divide as before, and so pro1.3 ceed to the lowest denomination; 4 fgs. = 1d. and the several quotients will be the value required. 9) 12 EXERCISES. 55. What is the value of 3 of a shilling ? Answer, 10 d. 56. Required the value of į of a guinea. Answer, 4s. 8d. 57. Reduce of a yard of Cloth to its proper quantity. Answer, 3 qrs. 2 nls. 58. Reduce of a pound avoirdupois to its proper quantity. Answer, 8 oz. 14 drs. 59. What is the proper quantity of of a hogshead of Beer ? Answer, 36 gallons. 60 Reduce of a pound troy to its proper quantity. Answer, 9 oz. 12 dwts. 61. Reduce 15 of a day to its proper quantity. Answer, 12 hrs. 55 min. 23 sec. 1's 62. What is the value of 15 of a pound sterling ?-Answer, 10s. 8d. 63. Reduce of a mile to its proper quantity. Answer, 4 fur. 22 poles. 4 yds. 2 feet, 1 in. 64. Reduce 15 of a ton to its proper quantity. Answer, 3 Cwt 1 qr. 18 lb. 12 oz. 8 dr. I. 4 14 qrs. Case 11th. To reduce any given quantity to the fraction of a higher denomination, retaining the same value. Example. RULE. fraction of a ton. Reduce the given quantity to 3 Cwt. 2 qrs. 8 lb. the lowest term mentioned for a numerator and place for a deno minator as many of the small as 28 make one of the greater denomi400 lb. nation.* 2240 lb, = 1 ton. Cases 10 and 11 prove each other. Answer, 400 = 16 = EXERCISES. 65. Reduce 18 shillings to the fraction of a pound. Answer, is 66. Reduce 7s. 3d. to the fraction of a pound. Answer, og 67. Reduce 8 oz. 2 dwts. to the fraction of a pound troy. Ans. 68. Reduce 2 qrs. 2 nls. to the fraction of a yard of cloth. Ans. Í 69. Reduce 4s. 8d. to the fraction of a guinea. Answer, 70. Reduce 2 roods, 20 poles to the fraction of an acre. Ans. Í 71. Reduce 12 gallons of beer to the fraction of a hhd. Ans. 72. Reduce 2 weeks, 5 days, to the fraction of a month. Ans. 1 % 73. Rednce 2 qrs. 14 lb. 1 oz. to the fraction of a Cwt. Ans. 1132 71. Reduce 15s. 9fd. to the fraction of a pound. 75. Reduce 13s. 8 d. to the fraction of a guinea. Answer, Iz CASE 12th. To reduce a fraction from one denomination to that of another, retaining the same value. Example. RULE. Reduce } of a pennyweight to When it is from a less name the fraction of a pound troy. $ to a greater, multiply the de nominator by all the denomina5 X 20 X 14 5 X 20 X 4 tions from that given, to the one Answer, do Answer, šu 1 1 400 4 sought. * Some Arithmeticians have given another Rule for reducing the fractions ; but the above may be best understood by the learner. Answer, 6 fo Answer, its 76. Reduce g of a penny to the fraction of a pound. 77. Reduce of a farthing to the fraction of a pound. Ans. Ideo 78. Reduce of a pound to the fraction of a penny. Ans. 490 79. Reduce of a guinea to the fraction of a penny. Ans.490 80. Reduce 9 of a lb. avoir. to the fraction of a Cwt. 81. Reduce to of a Cwt. to the fraction of a pound. Ans. 82. Reduce 11 of a week to the fraction of an hour. Ans. 1116 83. Reduce [ of a nail to the fraction of a yard. Answer, 177 84. Reduce is of a mile to the fraction of a foot. Ans. 2200 85. Reduce iz of a pint of wine to the fraction of a hhd. 86. Reduce ii of a pound to the fraction of a farthing. Ans. 5230 Ans. z 2 1 Ans. To ADDITION OF VULGAR FRACTIONS. Example. 3+5+2=10 Answer, li RULES. 1. When the fractions have a common denominator, add the numerators together, and place the common denominator under their sum. Example. Add 4, t, and $ together. 3x6x9=162 New 5 X 4 X 9=180 numerators. 8 X 4x6 =192 2. When the fractions have not a common denominator, reduce them to one, by Case 7th, and add the numerators together, as before. 534 Total. 4X6X9=216 Com. denom. 6)}=$6=217 Answer. را کن |