Which of the following statement is incorrect?

The difference between \(3\over7\) and \(2\over9\) is

Pugazh has been given four choices for his pocket money by his father. Which of the choices should he take in order to get the maximum money?

\(5{1\over3}-3{1\over2}=\)_______

\(8\div{1\over2}=\)_____

The number which has its own reciprocal is ________

The sum of any two proper fractions is always an improper fraction

The mixed fraction of \(13\over4\)is \(3{1\over4}\)

The reciprocal of an improper fraction is always a proper fraction

\(3{1\over4}\times3{1\over 3}=9{1\over16}\)

From his office, a person wants to reach his house on foot which is at a distance of \(5{3\over4}\)km. If he had walked \(2{1\over 2}km\)  how much distance still he has to walk to reach his house?

Which is smaller? The difference between \(2{1\over2}\ and\ 3{2\over3}\) or the sum of \(1{1\over2}\ and\ 2{1\over4}\)

Mangai bought \(6{3\over4}\) kg of apples. If Kalai bought \(1{1\over2}\) times as Mangai bought, then how many kilograms of apples did Kalai buy?

Add \(2\over3\)and\(3\over5\)

Simplify: \({3\over7}+{2\over3}\)

Simplify: \({3\over4}-{1\over2}\)

Convert mixed fractions into improper fractions and vice versa:
\(i)\ 3{7\over 18}\)
\(ii)\ {99\over7}\)
\(iii)\ {47\over6}\)
\(iv)\ 12{1\over9}\)