2-sided notes: Percent of a Number



2-sided notes: Percent of a Number

|What does the word “of” mean in mathematics? |____________ |

|What is Percent of a number? |Percent x __________ |

|Two ways to find the percent of a number: |_________________ Way |

| |_________________ Way |

|Writing a percent as a decimal: |Take off ________ sign |

| |Put a _______ at the end of the whole number |

| |Move decimal 2 places to the _________ |

| |Add a ______ as place holder if necessary |

|How to use the Decimal Way: |Turn percent into _________ |

| |________ that by the number |

|Example #1: DECIMAL WAY | |

|5% of 90 | |

| | |

| | |

|Writing a percent as a fraction: |Write the percent as the _____________ |

| |The denominator becomes ___ |

|How to use the Fraction Way: |Turn percent into a ________ |

| |_______ that by the number |

| |Put your answers in ________terms |

|Example #2: FRACTION WAY | |

|36 % of 50 | |

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| | |

| | |

|Practice : | |

|20% of 150 | |

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| | |

|Practice : | |

|25% of 640 | |

| | |

| | |

| | |

| | |

|The six grade students at EMS were going on a field trip. 85% of|85% of _____= _______ |

|the 280 students have turned in their permission slips. How many| |

|students have turned in their permission slips? | |

| | |

| | |

| | |

| | |

| | |

| | |

| | |

| |There are _______ sixth graders who turned in their permission slips. |

|The frozen yogurt stand in the mall sells 420 yogurt cups per | |

|day. Forty-five percent of the cups are sold to middle school | |

|students. How many yogurt cups are sold to middle schoolers each| |

|day? | |

| | |

| | |

| | |

| | |

| |There are _____ yogurt cups sold to middle schoolers at the mall each day. |

Percent of a Number

|What does the word “of” mean in mathematics? |Multiply |

|What is Percent of a number? |Percent x number |

|Two ways to find the percent of a number: |Better at fractions…. Turn percent to a fraction |

| |Better at decimals… turn percent into a decimal |

|Example #1: DECIMAL WAY |5% = .05 |

|5% of 90 | |

| |90 |

| |x .05 |

| |4.5 |

|Example #2: FRACTION WAY |36% = 36/100 |

|36 % of 50 | |

| |36 x 50 |

| |100 1 |

| |cross reduce by dividing the 50 and 100 by 50 |

| |36 x 1 = 36 = |

| |2 1 2 |

|Practice : | |

|20% of 150 |Answer = 30 |

|Practice : | |

|25% of 640 |Answer = 160 |

|The six grade students at SMS were going on a field trip. 85% of|85% of 280 = 238 |

|the 280 students have turned in their permission slips. How many| |

|students have turned in their permission slips? |There are 238 sixth graders who turned in their permission slips.|

|The frozen yogurt stand in the mall sells 420 yogurt cups per |45% of 420 = 189 |

|day. Forty-five percent of the cups are sold to middle school | |

|students. How many yogurt cups are sold to middle schoolers each|There are 189 yogurt cups sold to middle schoolers at the mall |

|day? |each day. |

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