Rule: for a mixed number, keep the whole number and convert the fraction part to a decimal.

Mixed number	=	1 1/5
Keep the whole number 1. Convert 1/5 to a decimal: multiply numerator and denominator by 2. 1/5 = (1 x 2)/(5 x 2) = 2/10 = 0.2.
As decimal	=	1 + 0.2 = 1.2