This is quite a simple process. For instance if we are finding the probability that when i flip a coin it will be heads we would say it is a 50%/ 0.5 chance because it is a half chance. If we do pigs will fly it will be a 0%/ 0 chance as it will never happen as i don't think evolution will go that far. That is how you find the probability using fractions and decimals.
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Starting with one of fraction, percent or decimal, find an equivalent value in one of the other ways of expressing numbers.
0.78% = 0.0078 in decimal = 78/10000 or 39/5000
to find the percent of a decimal, you would move the decimal over to the right twice and that's the percent. To find the fraction of a decimal, you would remove the decimal, put the number on top of the fration, and you would put, at the bottom, of the decimal as many zeros at the bottom of the fraction and put a 1 in front. for example 22.6. You would take out the decimal. Put 3 zeros at the bottom of the decimal because their are three numbers in 226 and put a 1 in front of the zeros
To change an inproper fraction to a decimal you divide the denominator by the numeratorand once you do that and you find your decimal you bring it over two times to the right.
Express both the percent and the fraction in decimal form, do the multiplication. Here is an example: what is 89% of three quarters? .89 x .75 = .6675