Add 21/36 and 28/40
21/36 + 28/40 is 77/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 36 × 10 = 360,
21/36 = 21 × 10/36 × 10 = 210/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
28/40 = 28 × 9/40 × 9 = 252/360 - Add the two like fractions:
210/360 + 252/360 = 210 + 252/360 = 462/360 - 462/360 simplified gives 77/60
- So, 21/36 + 28/40 = 77/60
In mixed form: 117/60
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