Step-by-step:
frac{31 times 3}{100} = frac{93}{100}, quad frac{7}{5} = frac{140}{100}, quad 20 = frac{2000}{100}31×3/100=93 /100,7/5=140/100,20=2000/100
Add all:
93+140+2000/100=2233/100=22.33