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1.) Let x = 0.666..... eq.1
10x = 6.666..... eq.2
eq.2 - eq.1. = 10x-x = 6.666... - 0.666....
= 9x = 6
= x = 6/9
= x = 2/3
Hence, 0.6....... = 2/3
2.) Let x = 0.4777....... eq.1.
10x = 4.777....... eq.2.
eq.2. - eq.1. = 10x - x = 4.777... - 0.477....
= 9x = 4.3
= x = 4.3/9
= x = 43/90
Hence , 0.477......... = 43/90
3.) Let x = 0.001001001.... eq.1.
1000x = 1.001001001.... eq.2.
eq.2 - eq.1. = 1000x - x = 1.001001001... - 0.001001..
999x = 1
x = 1/999
Hence, 0.001001001...... = 1/999
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