Two numbers are 20% and 50% more than a third. What percentage is the first of the second?
Two numbers are 20% and 50% more than a third. What percentage is the first of the second?
A: 80%
B: 70%
C: 65%
D: None of these
Let the third number be x. First number = x + 0.2x = 1.2x. Second number = x + 0.5x = 1.5x. Percentage of first to second = (1.2x / 1.5x) × 100 = (1.2 / 1.5) × 100 = 0.8 × 100 = 80%. The answer is 80%. This question tests percentage calculations in mathematics exams.