When the difference of the values to the right of the decimal are the same.
Example: 9.2-4.2=5
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A positive integer with more than two factors.
A positive integer with only two factors: one and the number itself.
Let L equal the larger of the two integers and S the smaller. Then L=2S. Also L-1/S=1/S. Starting with this second equation and solving for L results in L=2/S. Equating the two values of L produces 2/S=2S and 1/S=S. The solutions to this last equation are S=1 or S=-1. If L is to be the larger of the two integers, then S must equal 1 and L must equal 2.
0.80, 0.800. You can make more by adding 0's to the end of the number.
Because that it s harder to work out percentages than fractions and decimals