What is 1 over 2 called?

1/2 is called "one-half" (sometimes written as "one over two" in casual speech).

Detailed Explanation:

Official Names:

• Standard name: "One-half"
• Fraction reading: "One over two"
• Mathematical term: Unit fraction (numerator is 1)

Mathematical Classifications:

• Type: Proper fraction, unit fraction
• Decimal: 0.5
• Percentage: 50%
• Special name: "Half" (unique among fractions)

Why "Half" is Special:

• Most commonly used fraction
• Has its own unique word ("half") rather than following the pattern
• Compare: 1/3 = "one-third," 1/4 = "one-quarter" (or "one-fourth")
• But 1/2 = "one-half" (NOT "one-twoth")

Common Usage:

• "Half of the pizza"
• "Half an hour" (30 minutes)
• "Half price" (50% off)
• "Break it in half"

Mathematical Properties:

• Divides any number into two equal parts
• 1/2 + 1/2 = 1 (two halves make a whole)
• Equivalent fractions: 2/4, 3/6, 4/8, 5/10, etc.

Important Notes:

• Called "one-half" (not "one-second" or "one over two")
• Most basic and commonly used fraction
• Equals 0.5 or 50%
• Fundamental to understanding fractions