Final answer:
The decimal number 1.23 pounds can be written as the mixed number 1 23/100, with '1' representing the whole number and 23/100 representing the fractional part.
Step-by-step explanation:
The question involves converting the decimal number 1.23 pounds into a mixed number. First, note that 1.23 pounds is already almost in mixed number form, where 1 is the whole number part and 0.23 is the fractional part.
Next, to convert 0.23 into a fraction, we recognize that 23 is the hundredths place which is equivalent to the fraction 23/100. Thus, we can express 0.23 as 23/100, which is already in its simplest form since 23 and 100 have no common factors other than 1.
Therefore, the mixed number for 1.23 pounds is 1 23/100.