How do u write 1.2 as a fraction

Split the number into its whole number component and decimal component.

for the decimal component, 0.2 is the same as 2/10

Find the GCF of both 2 and 10 and that would be 2

divide both the numerator and denominator by the GCF

simplify and you get 1/5

Lastly combine the whole number component with the fraction and your answer would be 1 1/5.