Add 21/90 and 7/10
21/90 + 7/10 is 14/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
7/10 = 7 × 9/10 × 9 = 63/90 - Add the two like fractions:
21/90 + 63/90 = 21 + 63/90 = 84/90 - 84/90 simplified gives 14/15
- So, 21/90 + 7/10 = 14/15
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