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28 is 35% of 80.25% of 80:= 25% * 80= 0.25 * 80= 20
28
28 over 35 = 0.8 in decimal28/35:= 28 ÷ 35= 0.8 in decimal
To simplify 28 / 35, you divide by the GCF of 28 and 35. The GCF is 7, so 28 / 35 / 7 = 4 / 5.
Let's call this number x. 4x+7=35 4x=28 x=7