35 multiplied by 2.2 is 77.
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start with what you know: x + y = 35 x - y = 9 add them together: x + x + y - y = 35 + 9 resolve the rest of the facts: X + X = 44 X = 22 22 + y = 35 22 + y - 22 = 35 - 22 y = 13 confirm: 22 + 13 = 35 22 - 13 = 9
420 35 = 5 x 7 12 = 22 x 3 lcm = 22 x 3 x 5 x 7 = 420
Expressed as a percentage, 22/35 x 100 = 62.857142 recurring (that is, 62.857142857142...) percent.
22 x 0.35 = 7.7
22/35 x 100 = 62.857142 recurring (that is, 62.857142857...) or 62 and six sevenths percent.