Add 21/40 and 90/30
1st number: 21/40, 2nd number: 3 0/30
21/40 + 90/30 is 141/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
21/40 = 21 × 3/40 × 3 = 63/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
90/30 = 90 × 4/30 × 4 = 360/120 - Add the two like fractions:
63/120 + 360/120 = 63 + 360/120 = 423/120 - 423/120 simplified gives 141/40
- So, 21/40 + 90/30 = 141/40
In mixed form: 321/40
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