remember
(a/b) times (c/d)=(ac)/(bd) also
(ab)/c=(a/c)(b/c)
and
'of' means multiply
\(( \frac{1}{2} )( \frac{2}{3} )( \frac{3}{4} )( \frac{4}{5} )( \frac{100}{1} )\)=
\(\frac{1*2*3*4*100}{1*2*3*4*5}\)=
\(( \frac{2*3*4}{2*3*4} )( \frac{100}{5} )\)=
\((1)( \frac{100}{5} )\)=
\(\frac{100}{5}\)=
\(( \frac{5}{5} )( \frac{20}{1} )\)=
\((1)( \frac{20}{1} )\)=
20
answer is 20
or you can use bcalle's way and just cross multiply them
