Final answer:
0.8 as a fraction is 4/5, and as a percentage is 80%. This involves simplifying the fraction and converting the decimal to a percent by multiplying by 100.
Step-by-step explanation:
To write 0.8 as a simplified fraction, you start by writing it as a fraction with a denominator of 10 since 0.8 is equivalent to 8/10.
This fraction can be simplified by dividing both the numerator and denominator by their greatest common factor, which is 2, resulting in the simplified fraction 4/5.
To write 0.8 as a percentage, you convert the decimal to a percent by multiplying it by 100.
Therefore, 0.8 multiplied by 100 gives you 80%, which is the percentage form of 0.8.
Converting percents, calculating percentages, and unit conversion are essential skills in mathematics that help in representing numbers in different forms.