Any number that you can completely write down using digits is rational.
Let's try to write 2.51 completely with digits:
2.51That's it! We're pretty sure that 2.51 is rational.The official math definition of a rational number is: A number that can be written
as a fraction made of whole numbers. Let's try and write 2.51 as a fraction
made of whole numbers:
251/100We did it again! 2.51 is definitely rational.
0.502 is already a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. Its equivalent, in rational form, is 251/500.
1 and 251
148 over 251 = 148/251. It cannot be reduced any further since the greatest common factor of 148 and 251 is 1.
251 is a prime number; its factors are 1 and itself.
Only itself and one because 251 is a prime number
0.502 is already a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. Its equivalent, in rational form, is 251/500.
251 = 251/1
Factors of 251 are: 1 and 251.
251%
1 and 251
No, 251 is deficient.
251
152-251 = -99
4849 + 251 = 5100
814 = 563 + 251
Pointless, 251 is prime.
0.0478