When converting a decimal with tenths place to a fraction, what is the initial denominator?

• A. 10
• B. 100
• C. 1000
• D. 1

Answer: (A)

The position after the decimal tells you the initial denominator. If there is one digit after the decimal (the tenths place), you write the number as that digit over 10. So a decimal with tenths becomes something like d/10 (for example, 0.3 = 3/10). You can then simplify if possible, but the starting denominator for tenths is 10.