Rearrange the Weber fraction formula to help you find your specific Weber fraction. The original formula is delta I/I = K. The letter "I" stands for your weight. The term "delta" means your change in weight, or the noticeable weight. The letter "K" stands for the Weber constant, which is ".1". Change the formula by multiplying each side by "I." This makes the rearranged formula: delta I = I times K.
Insert the numbers that you already know. This includes the original weight and the Weber constant. Use the 5 kg as an example. The equation now looks: delta I = .1 times 5 kg.
Simplify the expression. Multiple the constant and the weight. The equation now looks: delta I = .5 kg. This means that delta I is equal to .5 kg.
Insert all numbers into the original fraction. This creates the fraction: .5/5 kg = .1. This is your completed Weber fraction.