Iron ore contains 54% iron. How many kilograms of iron is contained in 0.9 tons of such ore.

To solve this problem, we will use the rule for finding a fraction of a number: to find a fraction of a number, this fraction should be multiplied by pure.
Convert 54% to a fraction (1% = 0.01): 54% = 0.54
Find the fraction of the number: 0.54 * 0.9 = 0.486 t
We convert tons to kilograms: 0.486 / 1000 = 486 (kg)

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