Question

express in p/q 0.621 bar is on 21
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Answer 1

Answer:  x=123/198

Step-by-step explanation:

0.621 (bar on 21)

let x = 0.6212121...

multiply by 10 on both sides of the equation

10x=6.212121...                       (1)

multiply equation (1) by 100 on both sides

1000x=621.212121...              (2)

equation(2)-equation(1)

1000x=621.212121...

-    10x=6.212121...

⇒990x=615

⇒x=615/990

∴x=123/198

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