Add 7/40 and 21/45
7/40 + 21/45 is 77/120.
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,
7/40 = 7 × 9/40 × 9 = 63/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
21/45 = 21 × 8/45 × 8 = 168/360 - Add the two like fractions:
63/360 + 168/360 = 63 + 168/360 = 231/360 - 231/360 simplified gives 77/120
- So, 7/40 + 21/45 = 77/120
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