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To simplify the fraction 81/63, you need to find the greatest common factor (GCF) of both numbers, which is 9. Divide both the numerator and denominator by 9 to get the simplified fraction. Therefore, 81/63 simplifies to 9/7.
Nine 7x9=63 so 63/9=7 9x9=81 s0 81/9=9
63/81 = 21/27 = 7/9
The LCM is 3969.
2*9=18 7*9=63 9 will go into both 18 and 63