She was late 7 times. $42-$10=$32. $32/8 = 4. The first 3 days she was late plus the other 4 times being late that month is 7 days late.
The answer you are looking for is 1.
When you divide a fraction by another fraction, you flip the second one (make it the reciplical) and multiply straight across. 1/2 * 2/1 = 2/2, which simplified (divided by 2/2) is 1.
I hope this helps!
Using Estimation, by rounding 21 down to 20 and 88 up to 90, answer A would be the correct option.
