Question

which of the following number is the smallest 0.1,0.01,0.001,0.0001​

Answer 1

0.1 = 1/10 or 10%
0.01 = 1/100 or 1%
0.001 = 1/1000 or 0.1% (a tenth of 1%)
0.0001 = 1/10000 or 0.01% (a hundredth of 1%)

The last one is the smallest.