Both 4.7 and 4.70 are correct, but they convey slightly different meanings depending on the context.
- 4.7 typically represents a rounded or more precise value.
- 4.70 indicates that the number is precise to two decimal places, which could imply more certainty in measurement.
In most practical scenarios, if the value is meant to be read simply, 4.7 is sufficient. If you need to emphasize precision, especially in scientific, engineering, or financial contexts, you might use 4.70.