Add 54/90 and 40/42
54/90 + 40/42 is 163/105.
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,
40/42 = 40 × 15/42 × 15 = 600/630 - Add the two like fractions:
378/630 + 600/630 = 378 + 600/630 = 978/630 - 978/630 simplified gives 163/105
- So, 54/90 + 40/42 = 163/105
In mixed form: 158/105
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