When you multiply a whole number by a fraction, multiply the whole number by the numerator ( top number) and then divide by the denominator (bottom number).
8 x -8/9 = (8 *-8)/9 = -64/9 = -7 1/9 = -7.1
Its a bc of the roation it made to a 90 degrees
She would use 25 quarters which would make $6.25. And she would use two pennies.
You should summarize this question down next time , just some advice(: