You could make them have the same denominator, making it 7/10-5/10=2/10.
The answer is 2/10, or simplified, 1/5.
<span>31/50 by the way I love how some people realize so many people answered this question already and decide they should add something that is totally not necessary.
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ABC rotates 90 degrees clockwise to become EDF.
ABC undergoes transformation of 1/2 so reduces its original size.
The first one would be 90%. the second one would be 2.3%. the third one would be 150%. and the final one will be 83.3333%.
