The GCF of 9 and 20 is 1
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5 and 4 because -5-4 = -9 and -4*-5 = 20
2 goes into 4. 3 goes into 6 or 9. 5 goes into 10, 15, 20, 25, 30. 7 goes into 14, 21, 28.
42 goes into 398 9.48 times or 9 with remainder 20.
9 percent of 20 = 1.89% of 20= 9% * 20= 0.09 * 20= 1.8
Using decimals, 20% = .2 9 x .2 - hard to do in your head, so instead do 9 x 2 = 18. Then move the decimal point back where it goes. 1.8 Twenty percent of nine is 1.8.