How is the share of the heirs determined in relation to the inheritance?

In the case of inheritance by law, the heirs called to inheritance have equal shares in respect of the estate. However, the heirs may, by mutual agreement, divide the inheritance property into disproportionate portions. Thus, according to Article 1236 of RA Civil Code, the property that is part of the inheritance and is considered as the common property of two or more heirs can be divided among the heirs by their consent.