Add 28/80 and 49/70
28/80 + 49/70 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 70 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
28/80 = 28 × 7/80 × 7 = 196/560 - Likewise, for the 2nd fraction, since 70 × 8 = 560,
49/70 = 49 × 8/70 × 8 = 392/560 - Add the two like fractions:
196/560 + 392/560 = 196 + 392/560 = 588/560 - 588/560 simplified gives 21/20
- So, 28/80 + 49/70 = 21/20
In mixed form: 11/20
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