4000
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10 x 20 = 200
200 + 20% = 200 x (1 + (20/100)) = 200 x 1.2 = 240
10
20 percent of 200 = 20/100 x 200 = 4000/100 = 40
The answer is 10. let the number be k its given that 200% of that number is 20 In symbolic form, 200% of k = 20 200 per cent of k = 20 200/100 of k = 20 200/100 x k = 20 [of indicates multiplication] 2 x k = 20 k = 20/2 k = 10