6/j = 10/25
Cross=multiply: 10 x j = 6 x 25 ie 10j = 150 so j = 15
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6 2/3 + 4 1/6 = 20/3 + 25/6 = 40/6 + 25/6 = 65/6 = 10 5/6
9 over 10 + 5 over 6 = 27 over 30 + 25 over 30 = 52 / 30 = 26/15 = 1 11/15
6 over 25 is 6 divided by 25 which is 0.24 If you take 6 over 25 and multiply numerator and denominator by 4 you get 24 over 100 which is 0.24
X - 6 x 9/10 = 5/12? X - 6 x 54/60 = 25/60 X - 6/1 = 25/54 X = 349/54 or 6.46296296
2 goes into 4. 3 goes into 6 or 9. 5 goes into 10, 15, 20, 25, 30. 7 goes into 14, 21, 28.