450 = 45,000% (multiply decimals by 100 to get the percent).
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To convert a percentage to a decimal, you divide the percentage by 100. So, to convert 450% to a decimal, you divide 450 by 100, which equals 4.5. Therefore, 450% as a decimal is 4.5.
450 to 45 is a 90% decrease. 45 to 450 is a 900% increase.
Expressed as a percentage, 70/450 x 100 = 15.5 recurring (that is, 15.5555...) percent.
145 as a percentage of 450 = 100*145/450 = 290/9 = 32.222...%
15%