420 / 70 = 6
Converting decimal to a percentage: 6 * 100 = 600%
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294/420 X100 = 70%
420
420 gallons. Here's how to find it; If X = Gallons of 80% mix, 0.8*X + 0.1*70 = 0.7*(X+70) Which we can then solve, 0.8X + 7 = 0.7X + 49 0.1X = 42 X = 420
40% of 420 is 168.
33.33 percent of 420 is approximately 140.