Answer:
1)
2/5 ≠ 10/15= 2/3 not equivalent
3/7 ≠ 6/7 not equivalent
9/7 = 1 2/7 = 9/7 equivalent
2)
a) 50/75 = 25*2/25*3= 2/3
b) 65/105 = 5*13/5*21= 13/21
c) 18/81 = 9*2/9*9= 2/9
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