1,000,000 / 0.4 = 2,500,000 x 0.7 = 1,750,000
Seventy percent of the number for which 40 percent is equal to 1,000,000 is 1,750,000.
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1/70 x 100 = 1.428571 recurring (that is, 1.428571428571...) percent.
50 percent of 70 of a fraction = 35/150% of 70= 50% * 70= 50/100 * 70= 1/2* 70= 70/2 or 35/1
105 gallons. Let the multiple of 70 gallons to add be x, then using the percentages of antifreeze in the solutions: (25 + 50x) ÷ (1 + x) = 40 ⇒ 25 + 50x = 40 + 40x ⇒ 10x = 15 ⇒ x = 1.5 Therefore add 70 x 1.5 = 105 gallons.
70 = 7000% ; 70/1 in fraction
40 is 100 percent. 40/100 = 0.4 is 1 percent. 30/0.4 = 75 percent.