7/5 x 10 x 21/7

Please Show work. On how to do this problem.

Thanks for your help !

For numerator, you have 7x10x21.

For denominator, you have 5x7.

Notice that both numerator and denominator have 7, so 7 can be eliminated.

Then you have 10x21/5.

Now we know 10=5x2.

So 10x21/5=5x2x21/5=2x21=42

Therefore, 7/5 x 10 x 21/7=42

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