Expanded Form of 51.21

51.21 = (5 * 101) + (1 * 100) + (2 * 1/101) + (1 * 1/102)
51.21 = (5 * 10) + (1 * 1) + (2 * 1/10) + (1 * 1/100)
51.21 = 50 + 1 + 2/10 + 1/100
51.21 = 50 + 1 + 0.2 + 0.01

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