Question

How many yards are in 2 millimeters

Answer 1

In 1 millimeter, there are 0.00109361
So in 2 mm, there are 2 × 0.00109361 = 0.00218722 yards

or do proportions:
$\frac{1mm}{0.00109361yd}$ = $\frac{2}{y}$

Cross multiply:

2 × 0.00109361 = y
0.00218711 = y 

0.00218722 yards are in 2 millimeters.