Add 7/20 and 4/45
7/20 + 4/45 is 79/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
7/20 = 7 × 9/20 × 9 = 63/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
4/45 = 4 × 4/45 × 4 = 16/180 - Add the two like fractions:
63/180 + 16/180 = 63 + 16/180 = 79/180 - So, 7/20 + 4/45 = 79/180
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