How much should be added to each term of 5:9 so that it becomes 3:5?

3 2 1 5

1

Alternatively :                        \(\frac{5 + x}{9 + x}\) =  \(\frac{3}{5}\)                                           25 + 5x = 27 + 3x                                                   2x = 2                                                    x = 1