Add 21/72 and 70/30
1st number: 21/72, 2nd number: 2 10/30
21/72 + 70/30 is 21/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 30 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 30 × 12 = 360,
70/30 = 70 × 12/30 × 12 = 840/360 - Add the two like fractions:
105/360 + 840/360 = 105 + 840/360 = 945/360 - 945/360 simplified gives 21/8
- So, 21/72 + 70/30 = 21/8
In mixed form: 25/8
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