8.9/2.1 = 4.238095 recurring (that is, 4.238095238095...)
4.2381 (rounded)
21.978
9 divided into 89 = 0.10112359550561797
2.492 divided 89 = 0.028
44.5
10.8427
302
0.6292
0.0674
89 is a prime number; this means that it can only be divided by 1 and itself, 89.
0.1984
0.0371
89 - 21 = 68