The fraction which is not equivalent to the other is:
4050
1215
1620
915
Let us find the simplest form of given fractions
4050=451215=451620=45915=35
Since 915=35 which is not equivalent fraction to other
Hence, 915is which is not equivalent to the other
The fraction 45 is not equivalent to the fraction
Fraction 5/7 is not equivalent to: