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The Franklin Written Arithmetic: With Examples for Oral Practice


This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1878 Excerpt: ...itself, is 100 times A of 750, or 30(0. Am. 3000 bu. Hence the following Rule. To find the base when the percentage and rate per cent are given: Divide the percentage by the numerator of the rate per cent, and multiply the quotient by 100. Note. Since 750 divided by 25 and multiplied by 100 equals 750 divided by 0.25 (which is the rate per cent), the form of written work given below may be used instead of that above: Written WORK.-= 3000. Ans. 3000 bu. 0.25 Here the work is done by dividing the percentage by the rate per cent. This rule agrees with formula 4, page 192. 474. Examples for the Slate. (15.) $48 is 3% of what number? 10$ of what number? (16.) 436 days is 24% of what number? 8$ of what number? (17.) $ 31.35 is 5$ of what number? 15$ of what number? (18.) $ 300 is 7% of what number? 5$ of what number? (19.) 1220.50 is 105$ of what number? 75$ of what number? (20.) f is 25$ of what number? % of what number? 21. The number of children of school age in a certain town is 1275; if this is 20 of the whole population, what is the whole population? 22. I drew out 25$ of my deposits in a bank; of this I have spent $468.72, which is 9$ of what I drew out. What did I draw out? What remains in the bank? 23. If $240 is 20% more than some number, what is that number? Note. Since $ 240 is 20 % more than the number sought, it must be 120% of the number sought, etc. Hence when the amount is given instead of the percentage, divide by 100 plus the numerator of the rale per cent, and multiply by 100. 24. $ 1860 is 25$ more than what number? 25. A sold a horse for $ 225, which was 5% more than he paid for it. What did he pay for it? 26. A grocer sold tea for 115 % of its cost, and made 9 cents per pound. What did it cost a pound? 27. If $450 is 10% less than some numb... Hide synopsis

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