Add 21/72 and 15/35
21/72 + 15/35 is 121/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 35 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 72 × 35 = 2520,
21/72 = 21 × 35/72 × 35 = 735/2520 - Likewise, for the 2nd fraction, since 35 × 72 = 2520,
15/35 = 15 × 72/35 × 72 = 1080/2520 - Add the two like fractions:
735/2520 + 1080/2520 = 735 + 1080/2520 = 1815/2520 - 1815/2520 simplified gives 121/168
- So, 21/72 + 15/35 = 121/168
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