Add 21/56 and 70/80
21/56 + 70/80 is 5/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 56 × 10 = 560,
21/56 = 21 × 10/56 × 10 = 210/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
70/80 = 70 × 7/80 × 7 = 490/560 - Add the two like fractions:
210/560 + 490/560 = 210 + 490/560 = 700/560 - 700/560 simplified gives 5/4
- So, 21/56 + 70/80 = 5/4
In mixed form: 11/4
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