What is 6.4 written as a fraction simplified

6.4 written as a fraction in simplest form is 32/5.

To write 6.4 as a fraction, we first need to convert the decimal part into a fraction. Since 6.4 has one decimal place, we can write it as 6⅖.

Now, to simplify this fraction:
- Write the whole number part separately, which is 6.
- Write the fraction part as a simplified fraction:
- The numerator will be the number after the decimal point, which is 4.
- The denominator will be based on the number of decimal places, which is 1. So, the denominator is 10 (since there is one decimal place).

Combining the whole number and the fraction, we get the simplified fraction 6⅖.