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you cant. You have to divide the bigger number first.
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To find the average of a set of numbers, you add them together and then divide by the total number of values. In this case, the sum of 8, 18, and 28 is 54. Divide 54 by the total number of values (3 in this case) to get the average, which is 18.
5/9 + 5/6 = 25/18...the change it to a mix number = 1 7/8 To add fractions you need the bottom number to be the same. To do this, find a number that both 9 and 6 can divide into: (in this case 18) 5/9 = /18 + 5/6 = /18 Then, how many times can 9 divide into 18? 6 into 18? 5/9 = 10/18 + 5/6 = 15/18 Now add 10 and 15 and leave 18 on the bottom = 25/18 To change to a mix number take 25 and divide it by 18...how many times can 18 go into 25? Just once, the remainder is 7...SO 1 and 7/18 (18 being the number you started to divide with) The ANSWER is 1 7/18
To find 15% of a number, you can multiply the number by 0.15. So, if we let the number be x, the equation would be 0.15x = 18. To solve for x, you would divide both sides by 0.15, giving you x = 18 / 0.15 = 120. Therefore, 15% of 120 is 18.