Add 28/70 and 70/80
28/70 + 70/80 is 51/40.
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,
28/70 = 28 × 8/70 × 8 = 224/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
70/80 = 70 × 7/80 × 7 = 490/560 - Add the two like fractions:
224/560 + 490/560 = 224 + 490/560 = 714/560 - 714/560 simplified gives 51/40
- So, 28/70 + 70/80 = 51/40
In mixed form: 111/40
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