Add 2/5 and 21/45
2/5 + 21/45 is 13/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 5 × 9 = 45,
2/5 = 2 × 9/5 × 9 = 18/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
21/45 = 21 × 1/45 × 1 = 21/45 - Add the two like fractions:
18/45 + 21/45 = 18 + 21/45 = 39/45 - 39/45 simplified gives 13/15
- So, 2/5 + 21/45 = 13/15
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