The first number is 80% of the second. What percentage of the first number is the second number?

Let the first number be x, and the second number 0.8x, then:
x / 0.8x = 1 / 0.8 = 10/8
10/8 = 1.25
1.25 * 100% = 125%
125% of the first number is the second number.



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