Express the sun of 321 9/100 and 42&7/10 in decimal from

Answer 1

9/100=0.09 since it is 9 over one hundred then the 9 is in the hundredths place

7/10=0.7 since it is 7 over ten then the 7 is in the tenths place

So,

321&9/100= 321.09

42&7/10 = 42.7

Now we add them together since I assume you meant to say "sum" instead of "sun" and we get 363.79