42 is 10% of 420.
420 - 42 = 378
420
420-42-42-420
The LCM of 60 and 42 is 420.
42 x 10 = 420
420
There are .42 amps in 420 mA. Equation 420/1000 = .42 amps
420 ÷ 10 = 42
47 - 5 = 42 (42 is the difference).
42% = 420 .42% = 4.2
With a calculator this can be done by doing 420*1.11.Without a calculator, it is also very easy, and is done by finding 10% of 420 which is 420/10 which is 42. So 42 = 10% of 420. And 1% of 420 is 4.2. 1%+10%+100% = 4.2+42+420 =466.2.466.2Very basic.:)