Add 9/72 and 21/40
9/72 + 21/40 is 13/20.
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,
9/72 = 9 × 5/72 × 5 = 45/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
21/40 = 21 × 9/40 × 9 = 189/360 - Add the two like fractions:
45/360 + 189/360 = 45 + 189/360 = 234/360 - 234/360 simplified gives 13/20
- So, 9/72 + 21/40 = 13/20
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