How do I reduce the number of decimal points
Do you mean the number of decimals shown? (there's just one decimal point)
Select the number of decimals in the Options Menu.
GeoGebra v.5: select Options->Rounding
GeoGebra v.6: select the menu icon on top right. Select Settings in the displayed menu, then choose the desired rounding in the appearing window.
Apps: select the wheel icon on top right, then select Settings in the context menu. The Settings panel opens. Select the wheel icon on the right, then select the number of desired decimal places from the Rounding drop down list. Save settings.
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