First of all ... a percent is a fraction where the denominator is 100.
A percent is a number with a '%' at the end.
Percent means 'out of 100' because 'cent' means 100 and 'per' means 'out of'.
The Vocab you'll need to know ..
Fraction has a numerator(part) and a denominator (whole; cannot be zero)
Numerator is the top part of the fraction or the PART .
Denominator is the bottom part of the fraction or the WHOLE.
Ratios tells how one number is related to another number
Decimals are the numerical expression of a percent.
what is 50%?
50% is half of one 100. to get it you divide 100 by 2
so if you want to find 50% of anything, you divide it by two.
What is 25%?
25% is half of a half.
its 100/2 which is 50. then 50/2 which is 25.
to find 25% you either divide by 4 or cut the whole in half then half again.
What is 10%?
10% one tenth of 100
to find a tenth of something you divide it by 10
10 is a tenth of 100 because 100/10 is 10.
What is 5%?
5% is 100 divided by 20
or you can find 10% and then cut it in half to get 5%
What is 1%?
1% is a number(100) divided by 100.
to find 1% of something you divide by 100.
CONVERSION:
percent to a decimal:
% divided by 100
eg:
23% / 100 = 0.23
Percent to a fraction:
% over 100
eg:
23%/100 = 23/100
Percent to a ratio:
%:100-%
Part 1 = %
part 2 = 100-%
eg:
23% = 23:77
Fractions:
Fraction to a decimal:
numerator divided by denominator
eg:
4/5 4 divided by 5 = 0.8
Fraction to percent:
Numerator divided by Denominator times 100
e.g
4/5 4 divided by 5 = 0.8 X 100 = 80%
Fraction to ratio:
Part 1 : part 2
part 1=numerator
part 2=denominator-numerator.
e.g.
4/5 = 4:1
Decimals:
Decimal to fraction:
.67
say it (sixty-seven hundredths)
write it 67/100
Decimal to percent:
decimal X 100
e.g
0.67 X 100= 67%
Decimal to ratio:
make the decimal into a fraction
N:D-N
e.g
0.67 = 67/100 = 67:33
Ratios:
Ratio to fraction:
part1/ part1 + part 2
e.g
7:3 = 7/10
8:4 = 8/12
Ratio to a decimal:
make the ratio into a fraction
Numerator divided by Denominator
= decimal.
eg.
7:3 = 7/10 = 7 divided by 10 = 0.7
ratio to percentage:
make the ratio into a fraction
N divided by D times 100
eg.
7:3 = 7/10 = 7 divided by 10 times 100 = 70%.
if you STILL don't get it use our growing posts :
Ardia's growing post
Monique's Growing post
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Ardia and Monique's probability page
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THE QUIIIZ = ).
THE QUIIZ 2 =)
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