Why should the add( ), subtract( ), multiply( ), divide( ) methods in the RationalNumber class in the textbook be declared to be public, while the gcd( ) method is declared to be private?

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The Answer of Why should the add( ), subtract( ), multiply( ), divide( ) methods in the RationalNumber class in the textbook be declared to be public, while the gcd( ) method is declared to be private?

Why Should the Add( ), Subtract( ), Multiply( ), Divide