Add 21/30 and 70/72
21/30 + 70/72 is 301/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 30 × 12 = 360,
21/30 = 21 × 12/30 × 12 = 252/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
70/72 = 70 × 5/72 × 5 = 350/360 - Add the two like fractions:
252/360 + 350/360 = 252 + 350/360 = 602/360 - 602/360 simplified gives 301/180
- So, 21/30 + 70/72 = 301/180
In mixed form: 1121/180
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