PERCENT WITH A CALCULATOR PROBLEMS To see the answer, pass your mouse over the colored area. 1. a) Every percent problem involves how many numbers? Three. 1.
b) What are those numbers called? The Amount, the Percent, 1. c) How can we always recognize the Base? It follows "of." 2. In each of the following, which number is the Amount, which is the
3. The Three Rules. To find the unknown number, 3. In the other two cases, divide. 4. Use your calculator to answer the following. 4. a) How much is 37.5% of 96? 36 4. b) 96 is 37.5% of how much? 256 Compare this operation with a). 4. c) $13.50 is what percent of $21.60? 62.5% 5. Amount = Base × Percent. Calculate each of the following. 5. a) 37% of $69.50. $25.72 b) 6.4% of $219. $14.02 5. c) 420% of $3.97. $16.67 d) .5% of $1,243.00. $6.22 5. e) 53.8% of $63.20. $34.00 f) 7.89% of $86.90. $6.86 6. Base = Amount ÷ Percent. 6. a) $89.50 is 26% of how much? $344.23 6 b) 14% of how much is $78.50? $560.71 6. c) 8.65% of how much is $22.91? $264.86 6. d) $63.40 is 43.1% of how much? $147.10 6. e) 7.1% of how much is $13.95? $196.48 7. Percent = Amount ÷ Base. Round off to one decimal place. 7. a) 28 is what percent of 41? 68.3% 7. b) 58 is what percent of 105? 55.2% 7. c) What percent of 348 is 107? 30.7% 7. d) What percent of $23.50 is $164.50 700% 7. e) $3.80 is what percent of $12? 31.7% 7. f) What percent of $16.50 is $25.16? 152.5% 8. Calculate the following. To report a Percent, round off to one 8. a) How much is 24.7% of $89.50? $22.11 8. b) $89.50 is 24.7% of how much? $362.35 8. c) $37 is what percent of $87? 42.5% 8 d) Find 39.6% of $28.60. $11.33 8. e) 8.65% of how much is $32.70? $378.03 8. f) $121.50 is what percent of $45? 270% 8. g) Find 52% of $79.80. $41.50 8. h) What percent of $90 is $27? 30% 8. i) $29.50 is 65.2% of how much? $45.25 9. Sandra was charged $31.15 for some supplies. That included a 4% tax. Continue on to the next Lesson. or Return to the previous section. Please make a donation to keep TheMathPage online. Copyright © 2012 Lawrence Spector Questions or comments? E-mail: themathpage@nyc.rr.com |