Division of a fraction is the equivalent of multiplying by its reciprocal
ex.

i suggest you try to remember this concept
in terms of your question
from this point, just multiple the numerators together and denominators together, then simplify if necessary
fyi- difference of squares

relating that to

also a side note, you might want to factor out the 4 first in the top fraction
Answer:
495
Step-by-step explanation:
45×10=450
450+45=495
Rounding to the nearest 10 means if the digit to the right of the 10s collum is 5 or more round up. if less than 5 round down.
605.8
610 is the answer as 5 is rounded up
Answer:
$18
Step-by-step explanation:
Multiply
27 * 1/3 = 9
Subtract
27 - 9 = 18
Best of Luck!