Convert the ratio to fraction first, then convert the fraction to decimal.
Example:
ratio = 3 : 4
3 : 4 = 3/4 = 0.75
Multiply the ratio by 100 and convert to decimal form (or convert and then multiply).
1.05 is a fraction. The fact that it is expressed as a decimal does not mean it is not a fraction. As a ratio, it can be written as 105/100. You may simplify that ratio if you so wish.
0.625 is a fraction. The fact that it is expressed as a decimal does not mean it is not a fraction. As a ratio, it can be written as 625/1000. You may simplify that ratio if you so wish.
You cannot convert a decimal into a decimal!
0.2 already is a decimal. There is nothing to convert.0.2 already is a decimal. There is nothing to convert.0.2 already is a decimal. There is nothing to convert.0.2 already is a decimal. There is nothing to convert.
Multiply the ratio by 100 and convert to decimal form (or convert and then multiply).
0.6666666... (with infinitely many digits).
You cannot convert Fahrenheit to decimal since Fahrenheit scale is not a ratio measurement. If it were a ratio measurement then 10 degrees F would be 10 times as warm (hot) as 1 deg F.
1.05 is a fraction. The fact that it is expressed as a decimal does not mean it is not a fraction. As a ratio, it can be written as 105/100. You may simplify that ratio if you so wish.
0.625 is a fraction. The fact that it is expressed as a decimal does not mean it is not a fraction. As a ratio, it can be written as 625/1000. You may simplify that ratio if you so wish.
You cannot convert a decimal into a decimal!
0.2 already is a decimal. There is nothing to convert.0.2 already is a decimal. There is nothing to convert.0.2 already is a decimal. There is nothing to convert.0.2 already is a decimal. There is nothing to convert.
A decimal is simply way of representing a ratio.
Convert 29.53 to decimal
The ratio would be 3.0 to 1 or, as a fraction, 30/10 (in order to retain the precision to the tenths place...it is bad form to place a decimal in the numerator or denominator on a fraction).
The answer will depend on what you want to convert into a decimal number.
multiply the decimal by 100 to convert it into a percent.