Add 72/40 and 21/45
1st number: 1 32/40, 2nd number: 21/45
72/40 + 21/45 is 34/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
72/40 = 72 × 9/40 × 9 = 648/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
21/45 = 21 × 8/45 × 8 = 168/360 - Add the two like fractions:
648/360 + 168/360 = 648 + 168/360 = 816/360 - 816/360 simplified gives 34/15
- So, 72/40 + 21/45 = 34/15
In mixed form: 24/15
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