What Is One Quarter?

Well it is 0.25, or 1/4 or .250=decimal-fraction equivalents.  It's a quarter of a whole which in turn takes four quarters to make a whole.

• One-fourth: One of four equal parts; "a quarter of a pound"  
• a district of a city having some distinguishing character; "the Latin Quarter"  
• (football,
  professional basketball) one of four divisions into which some games
  are divided; "both teams scored in the first quarter"
• a unit of time equal to 15 minutes or a quarter of an hour; "it's a quarter til 4"; "a quarter after 4 o'clock"  
• one of four periods into which the school year is divided; "the fall quarter ends at Christmas"  
• a fourth part of a year; three months; "unemployment fell during the last quarter"  
• one of the four major division of the compass; "the wind is coming from that quarter"  
• a quarter of a hundredweight (25 pounds)  
• a United States or Canadian coin worth one fourth of a dollar; "he fed four quarters into the slot machine"  
• provide housing for (military personnel)  
• an unspecified person; "he dropped a word in the right quarter"  
• draw:
  Pull (a person) apart with four horses tied to his extremities, so as
  to execute him; "in the old days, people were drawn and quartered for
  certain crimes"
• stern: The rear part of a ship  
• divide into quarters; "quarter an apple"  
• piece of leather that comprises the part of a shoe or boot covering the heel and joining the vamp