Respuesta :

[tex]\frac{7}{30}[/tex] units of time is left.

What is a fraction?

  • A fraction is a component of a whole or, more broadly, any number of equal parts.
  • In everyday English, a fraction describes the number of pieces of a specific size, such as one-half, eight-fifths, and three-quarters.

To find how much time is left:

Given - Tony is given [tex]\frac{9}{10}[/tex] hour to mow a lawn. he only uses [tex]\frac{2}{3}[/tex]  the given time to mow the lawn.

Simplify subtract   [tex]\frac{9}{10}[/tex]  by  [tex]\frac{2}{3}[/tex]  as follows:

[tex]\frac{9}{10}-\frac{2}{3} =\frac{27-20}{30} =\frac{7}{30}[/tex]

Therefore, [tex]\frac{7}{30}[/tex] units of time is left.

Know more about fractions here:

https://brainly.com/question/17220365

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