Question

Which equation is true?

A.
9
16
−
4
8
=
5
8
B.
7
8
−
3
4
=
1
8
C.
7
15
−
1
3
=
6
15
D.
1
2
−
1
20
=
10
20

Answer 1

9514 1404 393

Answer:

`\textbf{B. }\quad(7)/(8)-(3)/(4)=(1)/(8)`

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