How do you convert 0.8 as a fraction?

Hint: In the given question, we have been asked to convert a decimal number as a fraction. To do that, we first count the number of digits after the decimal point; let it be ‘c’. Then we just remove the dot and treat the new (dot-free) number as the numerator. The denominator is equal to the digit \[1\] followed by ‘c’ zeroes. Then we just reduce the obtained fraction into the lowest form if possible.

Complete step-by-step answer:
Given a decimal number, \[n = 0.8\].
Number of digits after decimal, \[c = 1\].
So, numerator \[ = 8\] and denominator \[ = {10^1} = 10\]
Hence, \[0.8 = \dfrac{8}{{10}}\]
Reducing to lowest term by dividing by \[2\],
Thus, \[0.8 = \dfrac{4}{5}\]

Note: We must be careful while reducing the fraction into the lowest term as it is the place where a lot of error occurs.