![]() Ratio and Proportion Equality of ratios Two ratios a:b and c:d are equal if and only if a ×d = b ×c i.e. other comparisons such as length-to-width.Recall that a fraction is always used for part-to-whole comparison, but a ratio can be used for.In other words is a ratio, but is not a fraction. Remark You should remember that a fraction is also an ordered pair of numbers a and b with b0, except that a and b must be integers. Ratio and Proportion A ratio is an ordered pair of real numbers, written a:b, with b 0.
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