Add 45/72 and 42/45
45/72 + 42/45 is 187/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
45/72 = 45 × 5/72 × 5 = 225/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
42/45 = 42 × 8/45 × 8 = 336/360 - Add the two like fractions:
225/360 + 336/360 = 225 + 336/360 = 561/360 - 561/360 simplified gives 187/120
- So, 45/72 + 42/45 = 187/120
In mixed form: 167/120
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