we have
7/10 and 2/3
so
10=2*5
3=3*1
the LCM=2*5*3=30
therefore
the answer is 30
Rewrite the fractions with the common denominator
7/10 -----> multiply by 3/3 ------> 21/30
2/3 -----> multiply by 10/10 ----> 20/30
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