Jerick73 Scribepost for Percent Foldable
Yesterday, we had are homework was to copy down the key ideas in our foldable and show the recipes to find 10%, 5%, 1%, 25%, 150, 0.5%.
Key Ideas
You can use mental math strategies such as halving, doubling, and dividing by ten to find the percents of some numbers.
To calculate the percent of a number, write the percent as a decimal and then multiply by the number.
12.5 % of 50 =0.125 x 50 =6.25
Communicate the Ideas
1. Explain to a classmate how you could use mental math to find each of the following.
a)300% of 40 b)0.5 of 120 c)10.5% of 80
a)300% of 400 , 100% is 40 so you simply multiply 100% by 3 and you get 300%
b)0.5% of 120, Divide 120 by 100 to get 1% and divide by 2 to get half of 1 % which is 0.5%
c)10.5 of 80, Divide 80 by 10 to get the 10 percent , now you have your 10 , to get the .5 divide the 10% by 10 to get 1 % and half that one to get your .5% then add the numbers 10+.5
2. Describe two ways to find 6% of 120
- Divide by 10 to get 10% then divide by two to get 5% , after divide your 10% by 10 to get 1% and add 1%+5% to get your 6% number.
-Divide by 100 to get 1% and multiply that by 6 to get 6%
How To Find...
10% - Divide the Number by 10
5% - Divide by 10 then divide by 2
1% - Divide by 100
25% - Divide by 4
150% - Divide by 2 and add your 100% number with your 50% number
0.5% - Divide by 100 then Divide by 2
