Answer: 1/2
Step-by-step explanation: To write a percent as a fraction in lowest terms, remember that a percent is a ratio that compares a number to 100.
So here, 50% can be written as the ratio 50 to 100 or 50/100.
Notice however that 50/100 is not in lowest terms so we need to divide the numerator and the denominator by 50 which gives us 1/2.
Therefore, 50% can be written as the fraction 1/2.