Basic properties of fraction: the numerator and denominator of fraction are multiplied by (or divided by) the same integral which is not equal to zero, and the value of fraction remains unchanged, which is expressed as

Basic properties of fraction: the numerator and denominator of fraction are multiplied by (or divided by) the same integral which is not equal to zero, and the value of fraction remains unchanged, which is expressed as

a/b=(ac)/(bc) (c≠0)
a/b=(a÷d)/(b÷d) (d≠0)