Let x = 0.777...= 0.7
10x = 7.777.... = 7.7
10x-x = 7.7 - 0.7
9x = 7
x = 7/9
0.777.... = 7/9
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Verified answer
Let x = 0.777...= 0.7
10x = 7.777.... = 7.7
10x-x = 7.7 - 0.7
9x = 7
x = 7/9
0.777.... = 7/9
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