You have every right to be concerned, the descriptions "decimal benchmarks" and "fraction benchmarks" are open to many interpretations. In this case, make your own [reasonab

…le] interpretations. If the fractional benchmarks where 1/100 , this is an exact fraction 23/100. If they are taken to be 1/2, 1/4, 1/5, etc., .23 is closer to 1/4, than any other, BUT it is also closer still to 2/9 [hence the confusion]. For decimal benchmarks, there is less confusion, but it is still there. If the benchmarks are .1, .2, .3, .4, .5, .6, .7, .8, .9 etc., the nearest one is .2. If the benchmarks are further refined [between .2 and .3], with .21, .22, .23, .24, ... then .23 coincides with a benchmark. This is not my work I got it from anthony@yahoo.com ( Full Answer )