Express the decimal 0.3 as a ratio

0.3 = 3:10 as a ratio

0.3 percent (%) = 3:1000 as a ratio

To express the decimal 0.3 as a ratio, just follow these steps:

Step 1: Write down the number over one:

0.3 = 0.31

Step 2: Multiply both numerator and denominator by 10, 100, etc. depending on the number of digits after the decimal separator:

In this case, we have 1 digit after the decimal separator. So, multiply both numerator and denominator by 10 to get,

0.31 = (0.3 × 10)(1 × 10) = 310

Step 3: Convert the resulting fraction in step 3 to a ratio by replacing the fraction slash (/) with a colon (:) to get 3:10 as the answer.

The ratio 3:10 (using a colon) can also be expressed in words (3 out of 10) or as a fraction (3/10).