To subtract decimal,
first we convert them into fractions
and
then we cannot the final fraction into decimal.
Subtract 2.76 from 3.8
= 38/10 − 276/100
= 38/10 × 10/10 − 276/100
= 380/100 − 276/100
= ((380 - 276))/100
= 104/100
= 1.04
Subtract 9.398 from 34.65
= 3465/100 − 9398/1000
= 3465/100 × 10/10 − 9398/1000
= 34650/1000 − 9398/1000
= ((34650 - 9398))/1000
= 25252/1000
= 25.252