Add 21/72 and 63/40
1st number: 21/72, 2nd number: 1 23/40
21/72 + 63/40 is 28/15.
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,
21/72 = 21 × 5/72 × 5 = 105/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
63/40 = 63 × 9/40 × 9 = 567/360 - Add the two like fractions:
105/360 + 567/360 = 105 + 567/360 = 672/360 - 672/360 simplified gives 28/15
- So, 21/72 + 63/40 = 28/15
In mixed form: 113/15
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