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Let the number be x. Then, x × 7/10 – 38% of x = 112 => 7x/10 – 38x/100 = 112 => 70x – 38x = 112 × 100 => 32x = 11200 ∴ x = 350 ∴ 20% of 350 = 350 × 20/100 = 70
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