<p>Experimentally it was found that a metal oxide has formula&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>M</mi><mrow><mn>0</mn><mo>.</mo><mn>98</mn></mrow></msub><mi>O</mi></math>. Metal M, is present as&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi>M</mi><mrow><mn>2</mn><mo>+</mo></mrow></msup><mo>&#160;</mo><mi>a</mi><mi>n</mi><mi>d</mi><mo>&#160;</mo><msup><mi>M</mi><mrow><mn>3</mn><mo>+</mo></mrow></msup></math>&nbsp;in its oxide. Fraction of the metal which exists as&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi>M</mi><mrow><mn>3</mn><mo>+</mo></mrow></msup></math>&nbsp;would be:</p>