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Adding & subtracting decimals word problems

On Monday, Vanessa and Ishaan decided to see how fast they could sprint 200200 meters. They asked their friend Luis to time them with a stopwatch.
Vanessa sprinted first and ran 200200 meters in 54.9154.91 seconds. When it was Ishaan's turn, he sped off and completed the run in 46.0746.07 seconds.
How much faster was Ishaan than Vanessa in seconds?
  • Your answer should be
  • an integer, like 66
  • an exact decimal, like 0.750.75
  • a simplified proper fraction, like 3/53/5
  • a simplified improper fraction, like 7/47/4
  • a mixed number, like 1 3/41\ 3/4
seconds