Convert each component of the ratio to a percentage form: 1:2:5

To convert each component of the ratio 1:2:5 to a percentage form, you can express each component as a fraction of the total ratio and then multiply it by 100.
The first component 1 can be expressed as $\frac{1}{(1+2+5)}=\frac{1}{8}$

Percentage of first component =$\frac{1}{8}\times 100$ = 12.5%
The second component 2 can be expressed as $\frac{2}{(1+2+5)}=\frac{2}{8}=\frac{1}{4}$

Percentage of second component =$\frac{1}{4}\times 100$ = 25%

The third component 5 can be expressed as $\frac{5}{(1+2+5)}=\frac{5}{8}$

Percentage of third component =$\frac{5}{8}\times 100$ = 62.5%
So, the percentage form of the 1:2:5 ratio is 12.5%, 25% and  62.5% respectively.