Add 2/5 and 21/90
2/5 + 21/90 is 19/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
2/5 = 2 × 18/5 × 18 = 36/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Add the two like fractions:
36/90 + 21/90 = 36 + 21/90 = 57/90 - 57/90 simplified gives 19/30
- So, 2/5 + 21/90 = 19/30
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