Add 84/90 and 15/40
84/90 + 15/40 is 157/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
84/90 = 84 × 4/90 × 4 = 336/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
15/40 = 15 × 9/40 × 9 = 135/360 - Add the two like fractions:
336/360 + 135/360 = 336 + 135/360 = 471/360 - 471/360 simplified gives 157/120
- So, 84/90 + 15/40 = 157/120
In mixed form: 137/120
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