Ratios are often classified using the following terms: profitability ratios (also known as operating ratios), liquidity ratios, and solvency ratios.
Ratios
Equivalent ratios.
They are called equivalent ratios.
When two ratios form a proportion, the ratios are equal
subtraction
Etymologically, they are the same activity. Both involve someone (the operator = mathematician or doctor) performing a procedue (operation: mathematical or medical) on something (operands: functional arguments or patients).
That's a proportion.
Pythagoras
they show us how to compare things
Formula
An expression.
Addition SubtractionMultiplicationSubtractionEtc.
The mathematical operation of multiplication.
division
No it isn't.
An expression