Add 20/45 and 24/21
1st number: 20/45, 2nd number: 1 3/21
20/45 + 24/21 is 100/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
20/45 = 20 × 7/45 × 7 = 140/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
24/21 = 24 × 15/21 × 15 = 360/315 - Add the two like fractions:
140/315 + 360/315 = 140 + 360/315 = 500/315 - 500/315 simplified gives 100/63
- So, 20/45 + 24/21 = 100/63
In mixed form: 137/63
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