an alloy consist of of 7 parts of zinc and 33 parts of copper find the percentage of copper in the alloy. Please write all the steps on a paper and explain the method.
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Total parts of copper = 33 parts
Total parts of zinc = 7 parts
Total no. of parts are 33 + 7 = 40 parts
Percentage of copper is = 33/ 40 × 100
= 165/2
= 82.5%
Answered by
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Answer: 82.5%
Given: 7 parts of zinc
33 parts of copper
To find: percentage of copper in the alloy
Method: add the two numbers
*7+33* = 40
= 33/40 (parts of copper out of the total no. of parts in alloy)
multiply it by 100
=> 33/40 x 100
=> 33/4 x 10 (cancelled zeros as they're common)
= 8.25 x 10
=> 82.5%
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