230k views
1 vote
Is 12/42=10/35 a true proportion

User HowAreYou
by
6.1k points

1 Answer

6 votes
Yes, they both are 2/7

Proof: Left-hand side

Simplify the following:
12/42

The gcd of 12 and 42 is 6, so 12/42 = (6×2)/(6×7) = 6/6×2/7 = 2/7:
Answer: 2/7
Right-hand side:

Simplify the following:
10/35
The gcd of 10 and 35 is 5, so 10/35 = (5×2)/(5×7) = 5/5×2/7 = 2/7:
Answer: 2/7
User Siegi
by
7.4k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.