Add 4/72 and 21/40
4/72 + 21/40 is 209/360.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
4/72 = 4 × 5/72 × 5 = 20/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
21/40 = 21 × 9/40 × 9 = 189/360 - Add the two like fractions:
20/360 + 189/360 = 20 + 189/360 = 209/360 - So, 4/72 + 21/40 = 209/360
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