4.5 times
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2 with 9 remaining 45 - 9 = 36 = 18 x 2
Five times.
9 times with a remainder of 1 or 9.5 times
79/9 = 8 and 7/9
2/9 × 18 = (2×18)/9 = 36/9 = 4 Alternatively, cancelling as you go: 2/9 × 18 = (2×18)/9 = 2×(18/9) = 2×2 = 4