Question

In a white metal there are 20 parts of tin 3 parts copper and 2 parts of antimony their percentage are

Answer 1

parts of tin = 20
parts of copper = 3
parts of antimony= 2
total parts = 20+3+2 = 25

percentage of tin =
$\frac{20}{25} \times 100 = 80\%$

Percentage of copper =
$\frac{3}{25} \times 100 = 12\%$


percentage of antimony =
$\frac{2}{25} \times 100 = 8\%$