Add 30/70 and 42/80
30/70 + 42/80 is 267/280.
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,
30/70 = 30 × 8/70 × 8 = 240/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
42/80 = 42 × 7/80 × 7 = 294/560 - Add the two like fractions:
240/560 + 294/560 = 240 + 294/560 = 534/560 - 534/560 simplified gives 267/280
- So, 30/70 + 42/80 = 267/280
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