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Efficiency = Output/Input. This is usually expressed as a percentage but may be given in the form of a ratio.

Another Answer

Efficiency is output power divided by input power, normally expressed as a percentage.

Q: Efficiency can be express mathematically as?

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if an equation is given the correct answer, it is mathematically correct.

Three equals eighth can be written mathematically as 3 = 1/8. To express this as a percentage, you would multiply by 100. Therefore, three equals eighth as a percent is 12.5%.

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Mathematically, never.

1.0x10^2

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Mathematically, efficiency = (energy output) divided by (energy input) as a percentage. As if we couldn't figure this out for ourselves, one of the laws of Thermodynamics formally tells us "You can't get more energy out than what you put in." Applying this law to the formula for efficiency, it says that the maximum possible efficiency is 100%. However, the next law of Thermodynamics says "You can't even get that much out."

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Three equals eighth can be written mathematically as 3 = 1/8. To express this as a percentage, you would multiply by 100. Therefore, three equals eighth as a percent is 12.5%.