a.6\7 din 35200=6\7×35200=6\7×352=2112\7=31,71.
b.8℅ din 180=8/100 din 180=8/100×180=8/1×18=144/1=144.
c.12℅ din 650+125℅din 28-30℅din 40=12/100din650+125/100din28-30/100din 40=12/10din65+125/100 din 28-3/10din 4 =780/10+3500/100-12/10=78+35-1,2=113+1,2=126.