A ratio is a comparison of two quantities of the same kind, even if they are having different units.
A ratio is a comparison of two quantities of the same kind with the same unit of measurement.
For example - 2lto50ml
∵1l=1000ml⇒2l=2×1000ml=2000ml⇒2000mlto50ml=2000:50=40:1
Hence, the given statement is false
For comparison by ratio, the quantities must have the same unit.
A ratio of two quantities is their comparison by difference.