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2009-10-31T16:46:20+01:00
1⁸/₉=17/9
7⁵/₉=68/9

(17/9):(68/9)*100% = 17/9*9/68*100% = 0,25*100%=25%
2009-10-31T16:49:30+01:00
7 ⁵/₉ - 100%
1 ⁸/₉ - x
x= ( 1 ⁸/₉ * 100%) / 7 ⁵/₉ = 25%
2009-10-31T16:53:15+01:00
7⁵/₉ = ⁶⁸/₉
1⁸/₉ = ¹⁷/₉
¹⁷/₉ ÷ ⁶⁸/₉ =¹⁷/₉ ×⁹/₆₈ = 0,25
0,25 x 100% = 25%