Question

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 thread is left?
A 9/20 of a foot
B 3/20 of a foot
C 1/20 of a foot
D 1/16 of a foot

Answer 1

A. Because 4 * 5 = 20, that makes it blank/20 then 1 * 4 is 4 and 1 * 5 is 5 and add 4 and 5, 9. that makes it 9/20