Add 21/72 and 80/45
1st number: 21/72, 2nd number: 1 35/45
21/72 + 80/45 is 149/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 45 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 45 × 8 = 360,
80/45 = 80 × 8/45 × 8 = 640/360 - Add the two like fractions:
105/360 + 640/360 = 105 + 640/360 = 745/360 - 745/360 simplified gives 149/72
- So, 21/72 + 80/45 = 149/72
In mixed form: 25/72
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