Add 70/15 and 42/72
1st number: 4 10/15, 2nd number: 42/72
70/15 + 42/72 is 21/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 15 × 24 = 360,
70/15 = 70 × 24/15 × 24 = 1680/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
42/72 = 42 × 5/72 × 5 = 210/360 - Add the two like fractions:
1680/360 + 210/360 = 1680 + 210/360 = 1890/360 - 1890/360 simplified gives 21/4
- So, 70/15 + 42/72 = 21/4
In mixed form: 51/4
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