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Anonymous
It is: 30/70 = 3/7.
Wiki User
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It is 7/30.
7/10
lowest common denominator= 70 therefore; 5/7 + 7/10 = 50/70 + 49/ 70 = 99/70= 1 and 29/70 5/7 - 7/10 = 50/70 - 49/70 = 1/70
70% of 30= 70% * 30= 0.7 * 30= 21
3/7 (three-sevenths).