125 : 128
3 : 5
3 : 4
2 : 5
Correct answer is D
a : b = 5 : 8 = 2.5 : 40
x : y = 25 : 16
ax : by = 2525 : 4016
= 1 : 4016
= 16 : 40
= 2 : 5
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