Passage: The Indian 500 MWe Prototype Fast Breeder Reactor is in the commissioning phase, with plans to build more.Another alternative to fast breeders is thermal breeder reactors that use uranium-233 bred from thorium as fission fuel in the thorium fuel cycle. Thorium is about 3.5 times more common than uranium in the Earth's crust, and has different geographic characteristics. This would extend the total practical fissionable resource base by 450%. India's three-stage nuclear power programme features the use of a thorium fuel cycle in the third stage, as it has abundant thorium reserves but little uranium.

Question: What is the rate of commonality of Thorium compared too uranium?
3.5 times