Add 21/24 and 72/90
21/24 + 72/90 is 67/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 24 × 15 = 360,
21/24 = 21 × 15/24 × 15 = 315/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
72/90 = 72 × 4/90 × 4 = 288/360 - Add the two like fractions:
315/360 + 288/360 = 315 + 288/360 = 603/360 - 603/360 simplified gives 67/40
- So, 21/24 + 72/90 = 67/40
In mixed form: 127/40
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