Which of the following fractions represents 90%?

To determine which fraction represents 90%, it's essential to understand that 90% can be expressed as a fraction out of 100. Therefore, 90% can be written as 90/100. When simplifying this fraction, both the numerator and the denominator can be divided by 10, yielding 9/10.

The fraction 9/10 indicates that out of 10 equal parts, 9 parts are being considered—this directly corresponds to the concept of 90%, where 90 out of every 100 parts signifies a strong majority or nearly the whole of something.

This understanding of fraction representation is why 9/10 is the correct answer. When considering the other fractions, they either represent lower percentages or do not precisely equate to 90%. Thus, 9/10 stands out as the correct representation of 90%.