Add 42/90 and 21/8
1st number: 42/90, 2nd number: 2 5/8
42/90 + 21/8 is 371/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
42/90 = 42 × 4/90 × 4 = 168/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
21/8 = 21 × 45/8 × 45 = 945/360 - Add the two like fractions:
168/360 + 945/360 = 168 + 945/360 = 1113/360 - 1113/360 simplified gives 371/120
- So, 42/90 + 21/8 = 371/120
In mixed form: 311/120
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