Added error checking for division by 0 on a branch called NewBranch. Benefits users so that they can't divide by 0 and get an error.

[colemayke]

Added error checking for division by 0. This benefits users so they can't divide by 0 and be met with errors or broken logic.

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[colemayke]

By adding exception errors that are thrown it stops the user by dividing by 0.