Finding Percent Using Benchmarks, Mental Math, and …
Finding Percent Using Benchmarks, Mental Math, and Common SenseI. Benchmark Percents: You can find certain percentages IN YOUR HEAD. These are called benchmarks. The percent benchmarks are listed below. See if you know how to find these in your head.Finding 100%: _______________________________________________Finding 50%: ________________________________________________Finding 25%: ________________________________________________Finding 10%: ________________________________________________Finding 5%: _________________________________________________Finding 1%: _________________________________________________II. Let’s Practice!!! Find the benchmarks of each whole. Make sure you label bar.1.) 80 100% = ____ 50% = ____ 25% = ____ 10% = ____ 5% = ____ 1% = ____ 2.) 120 100% = ____ 50% = ____ 25% = ____ 10% = ____ 5% = ____ 1% = ____ 3.) 90100% = ____ 50% = ____ 25% = ____ 10% = ____ 5% = ____ 1% = ____III. Multiples of Benchmarks: You can use scale factor to find multiples of your benchmark percents (ex: 30%, 35%, 8%,75%, etc.) 4.) What is 75% of 88? Which benchmark will help you? ____ Use SF to get to 75%. 5.) What is 90% of 120? Which benchmark will help you? ____ Use SF to get to 90%. 6.) What is 35% of 60? Which benchmark will help you? ____ Use SF to get to 35%.IV. Applying Your Knowledge: See if you can use what you have just learned to solve a real world problem.7.) The graph shows the monthly budget for the Bright family. If their monthly income is $2000, how much do they spend on each expense per month?ItemPercentAmount SpentMortgage25%Food15%Travel11%Clothing8%Other41%Fill in the missing fractions, decimals and percents in the table. (Simplified) FractionFraction (100ths)DecimalPercent25/1000.403/85%75%0.4413/200.6830/20022%12/10023/2562.5%50/10090/20066/1000.87523/500.20 ................
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