(1/33+2/33+.+12/33)/(13/135+14/135+.+19/135)=
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![(1/33+2/33+.+12/33)/(13/135+14/135+.+19/135)=](/uploads/image/z/13665947-59-7.jpg?t=%281%2F33%2B2%2F33%2B.%2B12%2F33%29%2F%2813%2F135%2B14%2F135%2B.%2B19%2F135%29%3D)
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(1/33+2/33+.+12/33)/(13/135+14/135+.+19/135)=
(1/33+2/33+.+12/33)/(13/135+14/135+.+19/135)=
(1/33+2/33+.+12/33)/(13/135+14/135+.+19/135)=
(1/33+2/33+.+12/33)/(13/135+14/135+.+19/135)
=[(1+2+.+12)/33]/[(13+14+.+19)/135]
=[135*(1+2+.+12)]/[33*(13+14+.+19)]
=[45*(1+2+.+12)]/[11*(13+14+.+19)]
=[45*(1+12)*12/2]/[11*(13+19)*7/2]
=[45*(1+12)*12]/[11*(13+19)*7]
=[45*13*3]/[11*8*7]
=1755/616
1755/616