We've had BCD since pretty much the beginning. IEEE floating point is defined for decimals in several precisions https://en.wikipedia.org/wiki/Decimal64_floatin

We've had BCD since pretty much the beginning. IEEE floating point is defined for decimals in several precisions https://en.wikipedia.org/wiki/Decimal64_floating-point_format https://en.wikipedia.org/wiki/Decimal64_floating-point_forma... It's just that top to bottom very few people are willing to trade the loss of speed for the increase in accuracy (not that decimal is great either, you still run into plenty of repeating fractions)