Find a Percentage of a Number SWBAT use the percent formula to find a percentage of a number; use a...
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![Page 1: Find a Percentage of a Number SWBAT use the percent formula to find a percentage of a number; use a percent proportion to find a percentage of a number.](https://reader036.fdocuments.in/reader036/viewer/2022082518/56649f055503460f94c1aa0d/html5/thumbnails/1.jpg)
Find a Percentage of a Find a Percentage of a NumberNumber
SWBAT use the percent formula to find SWBAT use the percent formula to find a percentage of a number; use a a percentage of a number; use a
percent proportion to find a percentage percent proportion to find a percentage of a numberof a number
![Page 2: Find a Percentage of a Number SWBAT use the percent formula to find a percentage of a number; use a percent proportion to find a percentage of a number.](https://reader036.fdocuments.in/reader036/viewer/2022082518/56649f055503460f94c1aa0d/html5/thumbnails/2.jpg)
ThinkThink
If Josie finds the perfect pair of shoes that If Josie finds the perfect pair of shoes that are originally $29.99, but are on sale at are originally $29.99, but are on sale at 10% off, how much money will she save?10% off, how much money will she save?
![Page 3: Find a Percentage of a Number SWBAT use the percent formula to find a percentage of a number; use a percent proportion to find a percentage of a number.](https://reader036.fdocuments.in/reader036/viewer/2022082518/56649f055503460f94c1aa0d/html5/thumbnails/3.jpg)
Percent FormulaPercent Formula
Percentage FormulaPercentage Formula Rate (r) Rate (r) · Base (b) = Percentage (p)· Base (b) = Percentage (p) rb=prb=p Write the percent as a decimal (rate)Write the percent as a decimal (rate) Multiply it by the whole number (base)Multiply it by the whole number (base) This gives the percentage of the numberThis gives the percentage of the number
![Page 4: Find a Percentage of a Number SWBAT use the percent formula to find a percentage of a number; use a percent proportion to find a percentage of a number.](https://reader036.fdocuments.in/reader036/viewer/2022082518/56649f055503460f94c1aa0d/html5/thumbnails/4.jpg)
Percent ProportionPercent Proportion
percentagepercentage percentpercent
base 100base 100 Use cross products and solve for the Use cross products and solve for the
percentagepercentage
=
![Page 5: Find a Percentage of a Number SWBAT use the percent formula to find a percentage of a number; use a percent proportion to find a percentage of a number.](https://reader036.fdocuments.in/reader036/viewer/2022082518/56649f055503460f94c1aa0d/html5/thumbnails/5.jpg)
ExamplesExamples
40% of 4540% of 453% of 803% of 80111% of 32111% of 320.6% of 300.6% of 3060% of 4060% of 40115% of 90115% of 908% of 2608% of 2600.4% of 500.4% of 50
![Page 6: Find a Percentage of a Number SWBAT use the percent formula to find a percentage of a number; use a percent proportion to find a percentage of a number.](https://reader036.fdocuments.in/reader036/viewer/2022082518/56649f055503460f94c1aa0d/html5/thumbnails/6.jpg)
Try TheseTry These
28% of 280028% of 2800 .28 .28 ·· 2800 2800 784784
0.2% of 47500.2% of 4750 .002 .002 ·· 4750 4750 9.59.5
300% of 92300% of 92 3 3 · 92· 92 276276
28% of 280028% of 2800 x/2800 = 28/100x/2800 = 28/100 100x = 78400100x = 78400 784784
0.2% of 47500.2% of 4750 x/4750 = .2/100x/4750 = .2/100 100x = 950100x = 950 9.59.5
300% of 92300% of 92 x/92 = 300/100x/92 = 300/100 100x = 27600100x = 27600 276276