The following dimensionless ratios are often used for the characterisation of fluid machines.

It is a dimensionless ratio of useful energy output to energy input, expressed as a percentage.

The dimensionless ratio of the black hole spin to the black hole mass-energy j is 0.12 0.04.

Because it is a dimensionless ratio, laypeople find it difficult to interpret Sharpe ratios of different investments.

Any velocity can be interpreted as the slope of a curve; in geometric units, slopes are evidently dimensionless ratios.

The remaining dimensionless ratio should be a "random" number not much smaller than one, at the scale where the effective theory breaks down.

Directivity is a dimensionless ratio and may be expressed numerically or in decibels (dB).

It would not be possible to derive a formula consisting only of numbers and dimensionless ratios.

Equally important to the Fanno flow model is the dimensionless ratio of the change in entropy over the heat capacity at constant pressure, c.

Since the difference between two natural logarithms is a dimensionless ratio, the trait may be measured in any unit.