N*(1+90%) = 156 that is N*1.9 = 156 so N = 156/1.9 = 82.1053 approx.
Another Answer:-
It could be 15.6 because 156 minus 90% = 15.6
And so: (156-15.6)/156 times 100 = 90% increase
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1.25x = 120 ∴5x/4 = 120 ∴5x = 480 ∴x = 96
200
The answer is 70.70 + (0.90 x 70) =70 + 63 =133You can also solve this by:133 / 1.90 = 70
Answer:We need to find a number which increased by 3.5 of itself equals 621.Let that number be x.x increased by 3.5 of itself equals 621 implies x+ 3.5x = 621.x(1+3.5) = 621x(4.5) = 621x = 621/4.5x = 138Therefore the required number is 138.Source: www.icoachmath.com
83.6/1.045 = 80