\(n\mathrm{g}\) of substance X reacts with \(m\mathrm{g}\) of substance Y to form \(p\mathrm{g}\) of substance R and \(q\mathrm{g}\) of substance S. This reaction can be represented as, \(\mathrm{X} + \mathrm{Y} = \mathrm{R} + \mathrm{S}\). The relation which can be established in the amounts of the reactants and the products will be