Not sure about "completes" because the sequence continues.
The next number is 20 and you can verify that by fitting the following cubic equation:
u(n) = 5*(-n3 + 36n2 - 257n + 558)/12 for n = 1, 2, 3, 4, ...
35
If you want to take 25% of off 140. Multiply 140 by .4 to find 25% (this is 35). Then subtract 35 from 140: 140-35 = 105. You could also subtract 25 from 100: 100-25 =75. Then multiply 140 by .75 and you will get 105.
15, 21, 25, 35, 75, 105, 175, 525
1 x 525, 3 x 175, 5 x 105, 7 x 75, 15 x 35, 21 x 25
Expressed as a proper fraction in its simplest form, by dividing the numerator and denominator by 25, 75/175 is equal to 3/7 or three sevenths.
35
If you want to take 25% of off 140. Multiply 140 by .4 to find 25% (this is 35). Then subtract 35 from 140: 140-35 = 105. You could also subtract 25 from 100: 100-25 =75. Then multiply 140 by .75 and you will get 105.
35
15, 21, 25, 35, 75, 105, 175, 525
7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98, 105, 112, 119, 126, 133, 140, 147, 154, 161, 168, 175.
75/175 = 42.857%
175 is 75% of 233.33
75
1 x 525, 3 x 175, 5 x 105, 7 x 75, 15 x 35, 21 x 25
Expressed as a proper fraction in its simplest form, by dividing the numerator and denominator by 25, 75/175 is equal to 3/7 or three sevenths.
1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 175, 525
1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 175, 525