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 | |
| | |
| | |
| | |
|Practice : | |
|20% of 150 | |
| | |
| | |
| | |
|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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