2. Ben Gunn of Treasure Island bought of Stevenson Creamery, 44 Ocean Ave., H. I., Apr. 1 2 lb. Roquefort cheese at $1.25 3. E. H. Skinner bought of David Eklund & Co., Baltimore, Md., Paid $20 on Oct. 5; $10 on Oct. 15; $20 on Oct. 19; $25 on Oct. 25. 4. Wesley Iberg bought of the Polaris Electric Co., St. Paul, Minn., 5. Fred Frover purchased of the Homer Brown Supply Co., 4272 State St., Akron, Ohio, CHAPTER V PERCENTAGE Per cent means by the hundred. Hence, 5 per cent of a number means at the rate of 5 out of a hundred; 25 per cent means 25 out of a hundred, and so on. Per cent is usually indicated by the symbol %. Thus, 8% means 8 per cent, or 8 out of a hundred, or 8 hundredths. It can be written also 18 or .08. Seven and one half per cent can be written 71% or .075. Thus, per cent can be expressed either as a decimal fraction or as a common fraction. Rule. To express per cent as a common fraction, (1) write the number indicating the per cent for the numerator and 100 for the denominator, and (2) reduce this fraction to lowest terms. EXAMPLE. Express 5 % both as a decimal and as a common fraction in its lowest terms. Express as decimals and as common fractions in their lowest terms the following per cents: 1. 10% 5. 75% 9. 200% 13. 121 % 17. 871% 2. 20% 6. 100% 10. 275% 14. 81% 18.1% 3. 25% 7. 120% 11. 33% 4. 50 % 8. 150% Exercise Write the following decimals as fractions and as per cents: Write the following fractions as decimals and as per cents: The following is a tabulated list of the percentage equiva lents of commonly occurring fractions: 1. What is 50% of 100? of 80? of 60? of 360? of 500? of 1000? 2. What is 25% of 100? of 80? of 60? of 360? of 500? of 1000? 3. What is 10% of 100? of 80? of 60? of 360? of 500? of 1000? 4. What is 20% of 100? of 80? of 60? of 360? of 500? of 1000? 5. What is 5% of 100? of 80? of 60? of 360? of 500? of 1000? Base, Rate, Percentage The base is the number on which the percentage is computed. The rate is the number of hundredths and is usually expressed as a decimal. The percentage is the result obtained by taking a certain per cent of the base. Rule. To find the percentage when the base and rate are given, express the rate as a decimal and multiply the base by it. EXAMPLE 1. Find 6% of $50. $50 the Base, is the number on which the percentage is computed. .06 the Rate, is the number of hundredths taken. $3.00 the Percentage, is the result of multiplying base by rate. 1. What is 61% of 100? of 96? of 360? of 500? of 600? of 1? 2. What is 63% of 100? of 96? of 360? of 500? of 600? of 1? 3. What is 31% of 100? of 96? of 260? of 500? of 600? of 1? 4. What is 144 % of 100? of 96? of 360? of 500? of 600? of 1? 5. What is 83% of 100? of 96? of 360? of 500? of 600? of 1? 6. What is 87% of 100? of 96? of 360? of 500? of 600? of 1? 7. What is 37% of 100? of 96? of 360? of 500? of 600? of 1? 8. What is 62% of 100? of 96? of 360? of 500? of 600? of 1? 9. What is 663 % of 100? of 96? of 360? of 500? of 600? of 1? 10. What is 87% of 100? of 96? of 360? of 500? of 600? of 1? |