Add 20/25 and 15/42
20/25 + 15/42 is 81/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 42 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 25 × 42 = 1050,
20/25 = 20 × 42/25 × 42 = 840/1050 - Likewise, for the 2nd fraction, since 42 × 25 = 1050,
15/42 = 15 × 25/42 × 25 = 375/1050 - Add the two like fractions:
840/1050 + 375/1050 = 840 + 375/1050 = 1215/1050 - 1215/1050 simplified gives 81/70
- So, 20/25 + 15/42 = 81/70
In mixed form: 111/70
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