Which one is bigger 0.36 or 0.8?

To compare which number is bigger between 0.36 and 0.8, we can convert both numbers to fractions. 0.36 is equivalent to 36/100 or 9/25 when simplified. 0.8 is equivalent to 8/10 or 4/5 when simplified. Comparing the fractions, we see that 4/5 (0.8) is greater than 9/25 (0.36), therefore 0.8 is the larger number.