Add 28/70 and 81/80
1st number: 28/70, 2nd number: 1 1/80
28/70 + 81/80 is 113/80.
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,
81/80 = 81 × 7/80 × 7 = 567/560 - Add the two like fractions:
224/560 + 567/560 = 224 + 567/560 = 791/560 - 791/560 simplified gives 113/80
- So, 28/70 + 81/80 = 113/80
In mixed form: 133/80
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