To convert the decimal 0.8 into a fraction, we start by recognizing that 0.8 means 8 tenths. This can be written as the fraction 8/10.
Next, we can simplify this fraction. To simplify a fraction, we need to find the greatest common divisor (GCD) of the numerator (8) and the denominator (10). The GCD of 8 and 10 is 2.
Now, we divide both the numerator and denominator by their GCD:
- Numerator: 8 ÷ 2 = 4
- Denominator: 10 ÷ 2 = 5
So, 0.8 as a simplified fraction is 4/5.