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00:00 - 00:59 | patients with Express minus 4 by 5 is a rational number with denominator so there are two parts in this question in the first part the denominator should be 20 in the second quarter the denominator should be - 30 ways to express minus 4 by 5 is a rational number with denominator 20 in the first part of it considers first part first so what we are given is we are given minus 4 by 5 now we want to make the denominator denominator is 5 right now we want to make the denominator 20 so what do you observe that if we divide 20 by what is present in the denominator 5 will get 4 so if you multiply 5 by 4 will get 20 in the denominator and this is what we want and also if we multiply because now via multiplying the denominator by a certain number we have to multiply the numerator also by same number so we are going to multiply the numerator also buy for this believers - 4 x 4 will give us - 16 / 5 x 4 is |

01:00 - 01:59 | 27 this is how will represent the given rational number is a rational number with the denominator 20 that moved to the second part in the second part we have again the given that number is -4 Wi-Fi now we want -32 be present in the denominator now if we observe if we divide -30 by 55 is the number that is already present in the denominator will get -6 that means if we multiply this rational number or the numerator and denominator of the special number 1 - 6 we will get - 4 x minus 6 will be + 24 divided by 5 is -13 sadasya with the rational number with the denominator -30 that's all thank you |

**Introduction**

**Rational number a number of the form `p/q ` or a number which can be expressed in the form `p/q ` where p and q are integers and `q != 0` is called a rational number.**

**Every natural number is a rational number but a rational number need not be a natural number**

**Zero is a rational number.**

**Every integer is a rational number but a rational number need not be an integer**

**Every fraction is a rational number but a rational number need not be a fraction.**

**numerator and denominator If `p/q ` is a rational number then the integer p is known as its numerator and the integer q is called the denominator.**

**Positive rational number is said to be positive if its numerator and denominator are either both positive integers or both negative integers.**

**Negative rational number a rational number is said to be negative if its numerator and denominator are such that one of them is positive integer and another one is a negative integer.**

**Property 1 if `p/q ` is a rational number and m is a non -zero integer then `p/q = (p xx m) / ( q xx m )`**