Eight out of nine tons of peanut can extract one third of oil. How many tons of peanut are needed for each ton of oil?
Just multiply 3 times 8 / 9 and you get 8 / 3 tons
One ton of peanut kernel can squeeze 8 / 25 of oil. What's the oil yield of this kind of peanut kernel?
8/25=32%
4 / 3 tons of peanut can extract 16 / 9 tons of oil. How many tons of oil can be extracted per ton of peanut? How many tons of peanut do you need to extract 1 ton of peanut oil?
It can be squeezed: 16 / 9 △ 4 / 3 = 4 / 3 tons
Demand: 4 / 3 △ 16 / 9 = 3 / 4 tons