An ore contains 12% copper how many kilograms of the ore are required to get 69 kg of copper - Maths - Comparing Quantities

Question

An ore contains 12% copper how many kilograms of the ore are
required to get 69 kg of copper?

Abhishek Kr. Jha · Accepted Answer

Suppose total amount of ore required is xPercentage of copper=12% i
e 12kg of copper in 100kg of oreAmount of copper=69kgSince 100 kg
of ore contains 12 kg of copperso 1kg of ore contains 12100kg of
copper therefore x kg of ore contains 12x100kg of copperFor x kg of
ore to contain 69 kg of copper we must
have;12x100=69⇒x=69×10012=575Therefore 575kg of ore
contains 69 kg of copper

An ore contains 12% copper.how many kilograms of the ore are required to get 69 kg of copper?