express the following decimal expression into rational numbers i)-21.2137-.
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Answer:
Rational form of decimal expressions :
1 ) 0.24
= 0.24 × ( 100/100 )
= ( 0.24 × 100 )/100
= 24/100
= 6/25 [ p/q form ]
2 ) 2.327
= 2.327 × ( 1000/1000 )
= ( 2.327 × 1000 )/1000
= 2327/1000 [ p/q form ]
3 ) 0.86
= 0.86 × ( 100/100 )
= ( 0.86 × 100 )/100
= 86/100
= 43/50 [ p/q form ]
4 ) - 5.132
= -5.132 × ( 1000/1000 )
= (-5.132 × 1000 )/1000
= - 5132/1000
= - 1283/250 [ p/q form ]
5 ) 3.17
= 3.17 × ( 100/100 )
= ( 3.17 × 100 )/100
= 317/100 [ p/q form ]
6 ) 17.215
= 17.215 × ( 1000/1000 )
= 17215/1000
= 3443/200 [ p/q form ]
7 ) 0.0001
= 0.0001 × ( 10000/10000 )
= ( 0.0001 × 10000 )/10000
= 1/10000 [ p/q form ]
8 ) -21.2137
= -21.2137 × ( 10000/10000)
= -212137/10000 [ p/q form ]
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