25 is 62.5% of 40. To calculate this, divide the numerator (25) by the denominator (40) to get 0.625. Then, multiply this value by 100 to find the percentage in decimal form, resulting in 62.5%. Alternatively, you can convert 25 to a decimal by dividing 25 by 100, which equals 0.25. Multiplying 0.25 by 100 gives 25, so 25 is 62.5% of 40.