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Digiron [165]
3 years ago
15

How do you write 1.21 as fraction, when .21 is continuing?

Mathematics
1 answer:
Shtirlitz [24]3 years ago
3 0
x=1.212121... \\
100x=121.2121... \\
100x-x=121.2121...-1.212121... \\
99x=120 \\
x=\frac{120}{99} \\ x=\frac{40 \times 3}{33 \times 3} \\ x=\frac{40}{33}

The fraction is 40/33.
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