Add 63/70 and 42/80
63/70 + 42/80 is 57/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 70 × 8 = 560,
63/70 = 63 × 8/70 × 8 = 504/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
42/80 = 42 × 7/80 × 7 = 294/560 - Add the two like fractions:
504/560 + 294/560 = 504 + 294/560 = 798/560 - 798/560 simplified gives 57/40
- So, 63/70 + 42/80 = 57/40
In mixed form: 117/40
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