Add 63/72 and 42/80
63/72 + 42/80 is 7/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 72 × 10 = 720,
63/72 = 63 × 10/72 × 10 = 630/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
42/80 = 42 × 9/80 × 9 = 378/720 - Add the two like fractions:
630/720 + 378/720 = 630 + 378/720 = 1008/720 - 1008/720 simplified gives 7/5
- So, 63/72 + 42/80 = 7/5
In mixed form: 12/5
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