We must select a counter-example that makes the conclusion false.
3 is a prime, 5 is a prime, and 7 is a prime.
The conclusion is that all odd numbers are prime numbers.
A counter example is that 9 is an odd number but it is NOT a prime number.
Steps:
6 1/4 - 4 3/15 can also be written as 25/4 - 23/5
The LCD of 4 and 5 is 20.
That gives us 125/20 - 92/20.
Now, just subtract the numerators (leave the denominators the same).
That brings us to 33/20, which can be simplified to 1 13/20
Final Answer:

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Answer:
Step-by-step explanation:
Well the answer is 40 cause you count by 20 so if you in 20 t o times then you would get 40 percent