The number of decimal places to report depends on what you’re reporting. Generally, you should aim to round numbers while retaining precision. It’s best to present fewer decimal digits to aid easy understanding.
Use one decimal place for:
Means
Standard deviations
Descriptive statistics based on discrete data
Use two decimal places for:
Correlation coefficients
Proportions
Inferential test statistics such as t values, F values, and chi-squares.