If a DNA molecule were composed of 10% guanine, what per cen…

If a DNA molecule were composed of 10% guanine, what per cent of the molecule would be made up of cytosine, adenine, and thymine? (You do not need a calculator for this, you should be able to do it in your head.) Cytosine:   [x] % Adenine:   [y] % Thymine: [z] %