Add 72/63 and 70/15
1st number: 1 9/63, 2nd number: 4 10/15
72/63 + 70/15 is 122/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 15 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
72/63 = 72 × 5/63 × 5 = 360/315 - Likewise, for the 2nd fraction, since 15 × 21 = 315,
70/15 = 70 × 21/15 × 21 = 1470/315 - Add the two like fractions:
360/315 + 1470/315 = 360 + 1470/315 = 1830/315 - 1830/315 simplified gives 122/21
- So, 72/63 + 70/15 = 122/21
In mixed form: 517/21
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