Confidence votes 978. The range of 60-70 decibels sound pressure level is about as loud as normal conversation in 1 meter distance. The distance from the ears to the sound source is very important to the value of the SPL.
A fraction (from Latin fractus, broken) represents a part of a whole or, more generally, any number of equal parts. When spoken in everyday English, a fraction describes how many parts of a certain size there are, for example, one-half, eight-fifths, three-quarters.
In mathematics, a percentage is a number in the fraction of 100. It is often denoted with the symbol of %, or simply pct or percent. For example, 35% is equivalent to 0.35 or 35/100. The calculator above can take any two values and calculate the third value.