First note that 4.2 = 4.2/1; then multiply both numerator and denominator of this fraction by 10 to yield 42/10. This can be reduced to lower terms by dividing both numerator and denominator by 2 to yield 21/5. Since the integral factors of 21 are 7 and 3 while 5 is itself a Prime number, 21/5 can not be further reduced and is the answer sought.
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To turn 1.42 into a fraction, write it like this: 1 42/100. In simplest form it is 1 21/50.
fraction of 42 is 28 = 28/42 or 2/3
you can only turn a fraction to a mixed fraction if the numerator is larger than the denominator and the numerator is divisible wholly by the denominator. for example 45/7 is the fraction and you can turn this to mixed fraction into 6 3/7. look if you multiply 6 by 7 you will get 42. so the whole number is 6 then subtract it from 45 and you will get 3.
42 is an integer and not a fraction. However, it can be expressed in rational form as 42/1.
42/100 - This is in fraction and if you break this then you get 0.42