75% of what is 0.90
0.75x = 0.90
x = 0.90/0.75
x = 1.20 <== restaurant pays $ 1.20 wholesale
X+11=3
-11 -11
x=-8
you subtract 11 from both sides. then you got the answer.
16 t-shirts
because the rate is $6.25
$100/$6.25 =16
Hope this helps ;)
Let the concentration of new vinegar solution is x%.
According to question, we will get



Therefore the new concentration of vinegar is 49.17% .