Number ofhalf-liveselapsed Fractionremaining Percentageremaining 0 1/1 100 1 1/2 50 2 1/4 25 3 1/8 12 .5 4 1/16 6 .25 5 1/32 3 .125 6 1/64 1 .563 7 1/128 0 .781 ... ... ... n 1/2n 100(1/2n) The half-life of a quantity whose value decreases with time's the interval required for the quantity to decay to half of its initial value. The concept originated in describing how long it takes atoms to undergo radioactive decay but… (More on Half-life)