convert the pure recurring decimals into vulgar fractions 0.8
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let x = 0.8 bar - eq. 1
multiply eq. 1 by 10
10x = 8.8bar - eq. 2
eq 2 - eq 1
10x - x = 8.8bar - 0.8bar
9x = 8
x =8/9
multiply eq. 1 by 10
10x = 8.8bar - eq. 2
eq 2 - eq 1
10x - x = 8.8bar - 0.8bar
9x = 8
x =8/9
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