Change the decimals to whole number ×10−n Where n is the number of times to move the decimal point to the right to obtain whole number. 16.8=16.overparen8=168×10−1 0.36=0.overparen3overparen6.=36×10−2 Number of ribbons =
168×10−1
36×10−2
168
36
=4.667
Law of division of indices
am
an
=am−n
10−1
10−2
=10−1−2
10−1
10−2
=10−1+2
10−1
10−2
=101
10−1
10−2
=10 Number of ribbons =4.667×10 Number of ribbons =46.67 Number of ribbons ≈46