0
-21.5 is rational. Rational numbers are numbers that can be written as a fraction. Irrational Numbers cannot be expressed as a fraction.
Still curious? Ask our experts.
Chat with our AI personalities
BeauYou're doing better than you think!
Chat with Beau
JordanLooking for a career mentor? I've seen my fair share of shake-ups.
Chat with Jordan
CoachSuccess isn't just about winning—it's about vision, patience, and playing the long game.
Chat with CoachAdd your answer:
Earn +20 ptsQ: Is -21.5 rational or irrational
Write your answer...
Submit
Still have questions?
Continue Learning about Math & Arithmetic
Is a rational plus an irrational equals a rational?
No. A rational plus an irrational is always an irrational.
Is -131 rational or irrational?
rational
Is 215 rational?
Yes, 215 is rational.
Is the sum of a rational and irrational number rational or irrational?
It is always irrational.
What is the product of rational and irrational number?
The product of a rational and irrational number can be rational if the rational is 0. Otherwise it is always irrational.
Trending Questions
What is the period of a vibration such as a pendulum?
Has anyone one a million in minute to win it?
How do you find gravitational constant 9.81?
Is 346 divisible by 9?
What is the probability of choosing an even number from 8 things?
What is 0.604 as a fraction?
How do you find the mean of -3-6 5 12 8 -7 -2 3?
How many feet are in 2400 inches?
What is the reciprocal of 13.33?
What is f- value?
What is an equivalent mixed number?
What do you get when you multiply 123456789 by 123456789?
How many square miles are in an 2 mile radius?
What does a rose shape like?
Is 4165 divivible by 17?
Why is a negitave exponent put into fraction form?
What is 3 over 32 as a fraction in lowest terms?
Why the laser go in straight line and in same size?
What is Cartesian product and its examples?
What is the sum of 12 plus 14?
Copyright ©2025 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.