Yes, 1.75 is a rational number. A rational number is defined as any number that can be expressed as a fraction, where both the numerator and the denominator are integers, and the denominator is not zero.
In the case of 1.75, it can be written as the fraction 175/100. This fraction can be simplified by dividing both the numerator and the denominator by 25, yielding 7/4. Since 7 and 4 are both integers and 4 is not zero, it confirms that 1.75 fits the definition of a rational number.
Additionally, any terminating decimal, like 1.75, can always be converted into a fraction, further reinforcing that it is indeed rational. Therefore, 1.75 qualifies as a rational number.