38.7% means 38.7/100 =** 0.387**

30.2 lbs (1 kilogram/2.2 lbs) = **13.73 kilograms**

0.387 * 13.73 kilograms

**= 5.31 kilograms copper**

**=========================**

38.7% means 38.7/100 =** 0.387**

30.2 lbs (1 kilogram/2.2 lbs) = **13.73 kilograms**

0.387 * 13.73 kilograms

**= 5.31 kilograms copper**

**=========================**

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