An element with mass 820 grams decays by 26.8% per minute. How much of the element is remaining after 18 minutes, to the nearest 10th of a gram?

The element is remaining after 18 minutes with the rate of decaying of 26.8 % is 2.99 grams.What is the percentage?The amount of something is expressed as if it is a part of the total which is a hundred. The ratio can be expressed as a fraction of 100. The word percent means per 100. It is represented by the symbol ‘%’.An element with a mass of 820 grams decays by 26. 8% per minute.Then the mass remaining after one minute will be Remaining = 100 - 26.8Remaining = 73.2 %The element is remaining after 18 minutes will be Mass = 820 × (0.732)¹⁸Mass = 820 × 0.00364Mass = 2.985Mass ≈ 2.99 The element is remaining after 18 minutes is 2.99 grams.More about the percentage link is given below.