Add 21/60 and 9/40
21/60 + 9/40 is 23/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 60 × 2 = 120,
21/60 = 21 × 2/60 × 2 = 42/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
9/40 = 9 × 3/40 × 3 = 27/120 - Add the two like fractions:
42/120 + 27/120 = 42 + 27/120 = 69/120 - 69/120 simplified gives 23/40
- So, 21/60 + 9/40 = 23/40
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