The word "47-30" is spelled as four-seven-dash-three-zero, with the numerical digits being pronounced individually. The phonetic transcription for this word is /fɔr ˈsɛvən dæʃ ˈθri ˈzɪroʊ/. The dash, represented by the IPA symbol ʃ, is a substitute for the word "minus" or "subtract". This word may be commonly used in mathematical equations or when giving out specific time schedules in certain industries. It is important to spell out numbers correctly to avoid confusion and misinterpretation.

47-30 is a mathematical term that refers to the subtraction operation between two numbers, specifically 47 and 30. Subtracting 30 from 47 results in the value of 17. In mathematical terms, the operation of subtraction entails taking away one quantity (in this case, 30) from another quantity (in this case, 47) to find the difference or remaining value.

The number 47, being the minuend, signifies the initial quantity or the number from which the subtraction takes place. On the other hand, the number 30, referred to as the subtrahend, symbolizes the value that is being subtracted from the minuend. The result of this subtraction process is termed the difference or the remaining value, which in this instance is 17.

Subtraction is one of the fundamental arithmetic operations and is commonly used in various mathematical calculations, including solving equations, determining change in monetary transactions, and measuring differences between two values, among other applications. Typically represented by the minus sign (-), subtraction is an essential concept in mathematics that builds the foundation for more complex operations and concepts. The process of subtraction can be visualized as removing or taking away a specific quantity from a larger whole, ultimately leading to a lesser value. In this case, subtracting 30 from 47 results in the value 17, denoting the difference between the two numbers.