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multipliying by 1000000 on both sides

1000000x=12.142857.1428

subtracting eq 1 by eq 2

999999x=27142857-27.142857

x=27142857 / 999999

hence the prime factorisation of the denominator contains factor more than 2 or 5

so let 2

we took it becoz a rational num ill be in the form a/b

so,2

2

so our assumption that 2

so,from this we can say that 2

.............................................hope it helped u:)))))