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A seamstress has 1/4 of a foot of thread. Then she uses 1/5 of a foot of thread to sew a hole. How much of the thread is left?

A9/20 of a foot
B3/20 of a foot
C1/20 of a foot
D1/16 of a foot

Verified Answer :

answer is C) 1/20 of a foot

1/4 -1/5
= 5/20 - 4/20
=1/20

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