Add 21/32 and 72/90
21/32 + 72/90 is 233/160.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 32 and 90 is 1440
Next, find the equivalent fraction of both fractional numbers with denominator 1440 - For the 1st fraction, since 32 × 45 = 1440,
21/32 = 21 × 45/32 × 45 = 945/1440 - Likewise, for the 2nd fraction, since 90 × 16 = 1440,
72/90 = 72 × 16/90 × 16 = 1152/1440 - Add the two like fractions:
945/1440 + 1152/1440 = 945 + 1152/1440 = 2097/1440 - 2097/1440 simplified gives 233/160
- So, 21/32 + 72/90 = 233/160
In mixed form: 173/160
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