Add 21/60 and 7/8
21/60 + 7/8 is 49/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 8 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 8 × 15 = 120,
7/8 = 7 × 15/8 × 15 = 105/120 - Add the two like fractions:
42/120 + 105/120 = 42 + 105/120 = 147/120 - 147/120 simplified gives 49/40
- So, 21/60 + 7/8 = 49/40
In mixed form: 19/40
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