Answer :
in one ounce there are 28.3495 grams
rounded 28.25 grams
so in 21 grams there are 0.7407532009 ounces
rounded to 3/4 = .75
there are 3/4 of an ounce in 21 grams
rounded 28.25 grams
so in 21 grams there are 0.7407532009 ounces
rounded to 3/4 = .75
there are 3/4 of an ounce in 21 grams