-4.21 = -421/100 (as a mixed number)
= -421/100 (as an improper fraction)
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If the numerator is negative and the denominator is positive then the fraction will be negative. If the numerator is negative and the denominator is negative too then the fraction will be positive.
To convert 4.21 to a fraction, we first note that the decimal point is after the hundredths place. So, we can write 4.21 as 421/100. To simplify this fraction, we divide the numerator and denominator by their greatest common divisor, which is 1. Therefore, 4.21 as a fraction in simplest form is 421/100.
as a fraction of what?
There is no simple answer to the question.If only the numerator is negative then the fraction is a negative fraction which may be proper or improper. If the numerator and the denominator have the same sign then the fraction is positive. It is an improper fraction if they are both negative and a proper fraction if they are both positive.
421