Answer: 8 vests
Explanation:
Mrs Chapman used 3/4 yards of martial for 1 vest.
When she used 6 yards, we are told to calculate the number of vest she made.
3/4 yards = 1vest
6 yards = y
We represent the number of vest made with y.
(3/4) / 6 = 1 / y
0.75/6 = 1/y
Cross multiply
0.75y = 6
Divide both side by 0.75
0.75y/0.75 = 6/0.75
y = 8
She will make 8 vests from 6 yards.