For example, in the fraction 3/4, the numerator, 3, tells us that the fraction represents 3 equal parts, and the denominator, 4, tells us that 4 parts make up a whole. The picture to the right illustrates 3 4 {\displaystyle {\tfrac {3}{4}}} or Â¾ of a cake.
The Causes of Sunburn Blisters. Sunburn blisters are a result of overexposure to the UVA and UVB rays in the sun. â¢ UVA. These harmful rays penetrate deep into the bottom skin layers and damage the production of new skin cells. High doses of UVA rays will cause sunburn blisters.
1 Burns, if severe enough, can produce blistering. 2  This includes burns from heat, chemicals, and sunburns. 3  Allergic eczema is a skin condition that is caused or worsened by allergens and can produce blisters. 4  Another type of eczema, dyshidrotic eczema, also causes blistering, but its cause is unknown.ore rarely, blisters are the result of a skin condition. For many of these rare conditions, the cause is unknown. A few skin conditions that cause blisters include: 1  porphyrias. 2  pemphigus.