Simplify 9/(4s)*(9t)/-1

$\frac{9}{4 s} \cdot \frac{9 t}{- 1}$

Step 1

Move the negative one from the denominator of $\frac{9 t}{- 1}$ .

$\frac{9}{4 s} \cdot (- 1 \cdot (9 t))$

Step 2

Rewrite $- 1 \cdot (9 t)$ as $- (9 t)$ .

$\frac{9}{4 s} \cdot (- (9 t))$

Step 3

Rewrite using the commutative property of multiplication.

$- 1 \cdot 9 \frac{9}{4 s} t$

Step 4

Multiply $- 1$ by $9$ .

$- 9 \frac{9}{4 s} t$

Step 5

Multiply $- 9 \frac{9}{4 s}$ .

Combine $- 9$ and $\frac{9}{4 s}$ .

$\frac{- 9 \cdot 9}{4 s} t$

Multiply $- 9$ by $9$ .

$\frac{- 81}{4 s} t$

Step 6

Move the negative in front of the fraction.

$- \frac{81}{4 s} t$

Step 7

Combine $t$ and $\frac{81}{4 s}$ .

$- \frac{t \cdot 81}{4 s}$

Step 8

Move $81$ to the left of $t$ .

$- \frac{81 t}{4 s}$