You can't just figure it. Body fat needs to be measured before and after weight lossto determine the percentage lost. Skin calipers, bioelectrical impedance, bodpod,X-rays or MRI can be used to determine this.
To find "percentage weight loss", take your current weight, and divide it by your original weight. Then multiply this number by 100, to make it a percentage. If the resulting percentage is bigger than 100 (say, 103%), it means you have gained 3 percent of your original bodyweight. If the number is less than 100 (say, 93%), it means your are 93% of the weight that you original weight (i.e you have lost 7%).
To calculate weight loss percentage, subtract the new weight from the original weight to find the weight lost. Then, divide the weight lost by the original weight and multiply by 100 to get the weight loss percentage. For example, if someone's original weight was 150 pounds and their new weight is 140 pounds, the weight lost is 10 pounds. Dividing 10 by 150 and multiplying by 100 gives a weight loss percentage of 6.67%.
You cannot calculate weights to percentages. Percentages are comparisons of two related quantities so you can have one weight as a percentage of another weight, but not by itself.
It may vary. You have to look up molar weights for all the substances involved in the mix or compound. Then calculate the percentage.
To convert a percentage to kilograms, you need to know the total weight being represented by the percentage. If you provide the total weight, I can help you calculate 15% of that weight in kilograms.
Soxhlet extraction is the usual method; this doesn't require you to "calculate" anything, except to the extent that "(weight of fat/weight of original sample) * 100" is a calculation.
weight of person * percentage of burn% * 4=
The fat percentage of your body will drastically decrease as you gain muscle weight and lose fat. You will gain weight overall, but it will be lean tissue, which is much healthier for your body than fatty tissue.
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Of course it is possible ot gain weight in one day! If you eat as much as you need to eat then you wont gain weight in one day but if you eat a lot in one day then of course you are gonna gain weight in one day!
Statistics can be helpful and found in everyday life. You use it to calculate the percentage of people with diabetes, a basketball player's shooting percentage, freethrow percentage, losing weight, etc...
They exercise for experiments back on Earth to calculate weight loss, gain, sweat things like that. How i have no idea...