Add 21/16 and 90/70
1st number: 1 5/16, 2nd number: 1 20/70
21/16 + 90/70 is 291/112.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 70 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 16 × 35 = 560,
21/16 = 21 × 35/16 × 35 = 735/560 - Likewise, for the 2nd fraction, since 70 × 8 = 560,
90/70 = 90 × 8/70 × 8 = 720/560 - Add the two like fractions:
735/560 + 720/560 = 735 + 720/560 = 1455/560 - 1455/560 simplified gives 291/112
- So, 21/16 + 90/70 = 291/112
In mixed form: 267/112
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