What is 1.8 as a fraction?

1.8==

1.8 = 9/5 in simplest form, or 1 4/5 as a mixed number. As a percent it is 180%.

How to convert 1.8 to a fraction

There is 1 digit after the decimal point, so the last digit is in the tenths place. Write the digits over 10.
1.8 = 18/10
Simplify by dividing top and bottom by the GCF, 2.
18/10 = 9/5
As a mixed number:
1 4/5

18/10 = 27/15 = 36/20 = 45/25 = 90/50 = 9/5. All are equivalent; 9/5 is the one in lowest terms.

Convert another value with the decimal to fraction converter, or see neighbours in the fraction chart.

What is 1.8 as a fraction?

1.8 as a fraction is 9/5 (1 4/5 as a mixed number). Written over 10 it is 18/10, which simplifies to 9/5.

What is 1.8 as a percent?

1.8 × 100 = 180%.