That probably cannot be determined exactly, but the ancient Egyptians were using them before 3000 BC.
Sir Isacc Newton!
They weren't 'invented' - a gear ratio is simply the difference in the number of teeth on two connected gear wheels.
when a number of ratios give the same answer after solving the ratios the ratios are said to be equivalent ratios
Ratios are often classified using the following terms: profitability ratios (also known as operating ratios), liquidity ratios, and solvency ratios.
Ratios
1 - Activity ratios 2 - Profitability ratios 3 - Liquidity ratios
1 - Activity Ratios 2 - Liquidity ratios 3 - Profitability ratios
equivalent ratios are different ratios that name the same comparison
1 - Actiivty raios 2 - turnover ratios 3 - Profitability ratios 4 - Liquidity Ratios
No but percentages are ratios.
similarity ratios are ratios in which both the ratios are equal to each other
How do you do ratios