To compare two quantities, so their units must be the same. Two ratios can be compared by converting them into like fractions. If the two fractions are equal, we say that the two given ratios are equivalent. A ratio is a comparison between two or more like quantities in the same units. It suggests that a ratio can be simplified by dividing its terms by the same number. Therefore: This indicates that the terms of a ratio can be multiplied by the same number.