pre_text: The following table presents the contractual maturities of our debt investments as of April 26, 2019 (in millions): Actual maturities may differ from the contractual maturities because borrowers may have the right to call or prepay certain obligations.
table: Amortized Cost Fair Value
table: Due in one year or less $ 591 $ 589
table: Due after one year through five years 644 642
table: Due after five years through ten years 455 452
table: $ 1,690 $ 1,683
question: Analyse this data from a financial earnings document. What was the amortized cost that was due in one year or less as a ratio of the fair value for the same period?