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Compression Ratio is defined as the ratio of Maximum engine volume to minimum engine volume. In Mechanical Terminology, its ratio of Total Volume to Clearance Volume. It is fundamental specification of engine. For Spark Ignition engines, the ratio will be around 10:1 to 15:1.
The Gearing ratio is the ratio of how much a business owes (debt) compared to the total of the debt plus the amount the owners have invested (equity).n the above example the total debt is Â£180,000 and the owners equity is Â£60,000. The Gearing Ratio is given by using the formula = Debt / (Debt + Owners Equity) x 100% = 180,000 / (180,000 + 60,000) x 100% = 180,000 / 240,000 x 100% = 75%.