Miscellaneous Exercise on Percent-Grade 7, Math: 7th Feb

Percent and Decimals Match the following percent's to their decimal forms. 15% 0.15 2% 0.02 100% 1.00 5 3 0.0575 Find 7% of 280. 19.6 196 1.96 Find 0.5% of 500. 2.5 25 250 If x represents 2.8% of 270, then which of the following equation would not result in the correct value for x? x = (0.028)(270) x = (0.28)(270) The United States population is roughly 328 million people (328,000,000). The workforce participation rate, defined as the percent of the population working or looking for work, is 62.8%. The unemployment rate is the percent of the workforce that is looking for work, but cannot find it.How many people are working or looking for work in the United States?If the unemployment rate is currently 6.7%, then how many people are unemployed to the nearest hundred thousand? This is a two part question. Be sure to answer both parts. Percent Increase and Decrease Perform each of the following calculations. Increase 350 by 5% 367.5 Increase 34 by 2% 34.68 Decrease 160 by 12% 140.8 Decrease 12,500 by 7.5% 11562.5 Increase 1,300 by 6.5% 1384.50 Increase 2698 by 2 3 2772.20 Decrease 450 by 6% 423 Decrease 4.50 by 8% 4.14 A population of bacteria is growing at a rate of 20% per hour. If the population starts at 320, what is it an hour later? 360 356 372 384