`a)MSC: 320`
`NTP:4`
`(-9)/80=(-9.4)/(80.4)=(-36)/(320)`
`b)MSC: 627`
`NTP: 19;33`
`(-7)/19=(-7.33)/(19.33)=(-231)/627`
`1/33=(1.19)/(33.19)=19/627`
`c)MSC: 924`
`NTP: 22; 33; 7`
`16/42=(16.22)/(42.22)=352/924`
`(-3)/28=(-3.33)/(28.33)=(-99)/924`
`(-55)/132=(-55.7)/(132.7)=(-385)/924`