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Find the value and express as a rational...

Find the value and express as a rational number in standard form : `(-40)/(99)+ (-20)` (ii) `(-22)/(27)+(-100)/(18)` (iii) `(-36)/(125)+(-3)/(75)`

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(i)`(-40)/(99)+\ (-20)`
Taking L.C.M, we have
`=(-40-1980)/99`
`=-2020/99`
(ii) `(-22)/(27)+(-100)/(18)`
Taking L.C.M,
`=(-44-300)/54`
`=-344/54`
`=-172/27`
(iii) `(-36)/(125)+(-3)/(75)`
Taking L.C.M,
`=(-108-15)/375`
`=(-123/375)`
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