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Answer:
[tex]\textbf{B. }\quad\dfrac{7}{8}-\dfrac{3}{4}=\dfrac{1}{8}[/tex]
Step-by-step explanation:
Consider the alternatives:
A. 9/16 -4/8 = 9/16 -8/16 = 1/16 ≠ 5/8
B. 7/8 -3/4 = 7/8 -6/8 = 1/8 . . . true
C. 7/15 -1/3 = 7/15 -5/15 = 2/15 ≠ 6/15
D. 1/2 -1/20 = 10/20 -1/20 = 9/20 ≠ 10/20
