x*9/100 = 45 so x=45/(9/100)=500
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9 out of 20 can be written in fraction form, then converted into decimal form, then converted into percent form: 9 out of 20 can be written 9/20 next, divide the top number by the bottom number to convert into a decimal number: 9 divided by 20 = .45 next, multiply .45 by 100 and add the percent sign: .45 x 100 = 45 = 45%
45 - (9%) = 40.95
To convert a fraction to percent, multiply by 100 % 9/45 = 9/45 x 100 % = 20 %
45 is 25 percent of the number 180
Expressed as a percentage, 20/45 x 100 = 44.4 recurring (that is, 44.4444...) percent.