I suppose, in a technical sense. "Decimal form" is said by teachers and textbooks when speaking in contrast to "fractional form". 4500 is in either both forms or neither forms, but 'decimal form' isn't a real mathematical 'form' but a choice of expression.
4500.0 is decimal form.
4500/1 is fractional form.
Decimals make percentages easier. Fractions make dividing easier.
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4500% = 45 (since percent is a fraction of 100, divide 4500 by 100 to get decimal form.)
Oh, dude, math time! So, to find 3 percent of 4500, you simply multiply 4500 by 0.03 (which is the decimal form of 3 percent). That gives you a grand total of 135. Ta-da! Math wizardry at its finest.
That is the decimal form.
.125 is in decimal form. :)
That is in decimal form.