I’m not sure what you are exactly saying but if you are saying what 18 percent of 43 is then the say is 7.7 (rounded to one decimal place)
18/100= 0.18 (that is one percent of 18)
Now we need 43 percent of 18 so now we time 43 by 0.18 (by our one percent)
So 43 x 0.18= 7.74 but 7.7 rounded to one decimal place