Add 54/90 and 15/42
54/90 + 15/42 is 67/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
54/90 = 54 × 7/90 × 7 = 378/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
15/42 = 15 × 15/42 × 15 = 225/630 - Add the two like fractions:
378/630 + 225/630 = 378 + 225/630 = 603/630 - 603/630 simplified gives 67/70
- So, 54/90 + 15/42 = 67/70
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