67.345g rounded to the nearest 1.0 whole number
67.0 or 67 is to the nearest whole number
Look at the tenths place. If it's less than 5, round down. If it's greater than 5, round up. If it's equal to 5. look at the next digit and round that to see if you should round up or down. Then, if it's the last digit, round up. 3 is less than 5, so round down. 67 - 1 = 66 grams.