math

Find a common DENOMINATOR

for  8 and 3 this would be 24

then convert the mixed numbers to improper fractions

19 1/8 = 19 3/24 = 459/24

14  2/3  =  14  16/24 = 352/24

Now subract them

459/24 - 352/24 =  (459-352)/24 = 107/24  

Now convert back to mixed number and simplify the fraction (if possible)

107/24 = 4 11/24          Done!