Ratio and Proportion | CA CPT Maths | CMA Foundation Maths Video Lectures Watch This Full video for Complete learning on Ratio and Proportion CA Foundation Notes Maths Video Lectures. Get all your CA Foundation Ratio and Proportion Questions and Answers on this CA Foundation Video Lectures . What is Ratio? A Ratio is a comparison of the sizes of two or more quantities of the same kind by division. If a and b are two quantities of the same kind (in same units), then the fraction a/b is called the ratio of a to b. What is an Inverse Ratio? One Ratio is the inverse of another if their product is 1. Thus a:b is the inverse of b: a and vice versa. What is Proportion? An equality of two ratios is called a proportion. For quantities a,b,c,d are said to be in proportion if a:b= c:d Properties of Proportion- 1. Alternendo If a : b = c : d, then a : c = b : d. ab = cd Multiply both sides by bc ; ab x bc = cd x bc ac = bd a : c = b : d 2. Componendo If a : b = c : d, then a + b : b = c
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